Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Multi-objective decision-making for dietray assessment and advice
Lemmen - Gerdessen, J.C. van - \ 2017
University. Promotor(en): Jack van der Vorst; P. van 't Veer, co-promotor(en): Frits Claassen. - Wageningen : Wageningen University - ISBN 9789463437073 - 136
questionnaires - food - fractionation - modeling - diet - food intake - decision making - diet counseling - vragenlijsten - voedsel - fractionering - modelleren - dieet - voedselopname - besluitvorming - dieetadvisering

Unhealthy diets contribute substantially to the worldwide burden of non-communicable diseases, such as cardiovascular diseases, cancers, and diabetes. Globally, non-communicable diseases are the leading cause of death, and numbers are still rising, which makes healthy diets a global priority. In Nutrition Research, two fields are particularly relevant for formulating healthier diets: dietary assessment, which assesses food and nutrient intake in order to investigate the relation between diet and disease, and dietary advice, which translates food and nutrient recommendations into realistic food choices. Both fields face complex decision problems: which foods to include in dietary assessment or advice in order to pursue the multiple objectives of the researcher or fulfil the requirements of the consumer. This thesis connects the disciplines of Nutrition Research and Operations Research in order to contribute to formulating healthier diets.

In the context of dietary assessment, the thesis proposes a MILP model for the selection of food items for food frequency questionnaires (a crucial tool in dietary assessment) that speeds up the selection process and increases standardisation, transparency, and reproducibility. An extension of this model gives rise to a 0-1 fractional programming problem with more than 200 fractional terms, of which in every feasible solution only a subset is actually defined. The thesis shows how this problem can be reformulated in order to eliminate the undefined fractional terms. The resulting MILP model can solved with standard software.

In the context of dietary advice, the thesis proposes a diet model in which food and nutrient requirements are formulated via fuzzy sets. With this model, the impact of various achievement functions is demonstrated. The preference structures modelled via these achievement functions represent various ways in which multiple nutritional characteristics of a diet can be aggregated into an overall indicator for diet quality. Furthermore, for Operations Research the thesis provides new insights into a novel preference structure from literature, that combines equity and utilitarianism in a single model.

Finally, the thesis presents conclusions of the research and a general discussion, which discusses, amongst others, the main modelling choices encountered when using MODM methods for optimising diet quality.

Summarising, this thesis explores the use of MODM approaches to improve decision-making for dietary assessment and advice. It provides opportunities for better decision-making in research on dietary assessment and advice, and it contributes to model building and solving in Operations Research. Considering the added value for Nutrition Research and the new models and solutions generated, we conclude that the combination of both fields has resulted in synergy between Nutrition Research and Operations Research.

Interventiestudie Gezonde Schoolpleinen : Het effect op leerlingen van het herinrichten van schoolplein tot gezond schoolplein
Vries, S. de; Langers, F. ; Goossen, C.M. ; Rijn, S.E.M. van; Vlasblom, E. ; Sterkenburg, R.P. ; Pierik, F.H. - \ 2017
Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2830) - 113
kinderen - scholen - basisscholen - gebiedsontwikkeling - campus - gezondheid van kinderen - speelterreinen - spel - kwaliteit van het leven - sociaal welzijn - welzijn - vragenlijsten - beweging - concentreren - concentratie - children - schools - elementary schools - area development - child health - playgrounds - play - quality of life - social welfare - well-being - questionnaires - movement - concentrating - concentration
Older adults, mealtime-related emotions, and functionalities : tailoring protein-enriched meals
Uijl, Louise C. den - \ 2016
University. Promotor(en): Kees de Graaf, co-promotor(en): Stefanie Kremer; Gerry Jager. - Wageningen : Wageningen University - ISBN 9789462578920 - 178
meals - emotions - elderly nutrition - elderly - smell - food preferences - protein - proteins - questionnaires - young adults - chocolate - maaltijden - emoties - ouderenvoeding - ouderen - reuk - voedselvoorkeuren - eiwit - eiwitten - vragenlijsten - jongvolwassenen - chocolade

Background and aim

Dietary proteins are of special interest for the heterogeneous group of older adults, since these people do not always have an adequate protein intake. When protein-rich products are better aligned with the requirements of older persons, an adequate nutrient intake is more likely. In this thesis we therefore explored two approaches for tailoring protein-enriched meals to older consumer subgroups; emotion-based and functionality-based. We expected a better ‘product-cluster fit’ (i.e. a more positive meal experience) when the clusters’ meal associations are congruent to their mealtime expectations.


We conducted an online survey in which vital community-dwelling older adults (n=392) reported their mealtime-related emotions and mealtime functionality. Using a hierarchical clustering analysis we described clusters within our population. Subsequently, we explored the extent to which the expectations of these clusters can be applied for the development of tailored protein-enriched meals. For the emotion-based approach, we conducted two central location tests (CLTs, n=461) to explore older adults’ food-evoked emotions. For the functionality-based approach we conducted in-depth interviews in order to get further insights regarding functional mealtime expectations and attitudes towards proteins and protein-enrichment. Based on the latter insights we tailored PE meal concepts to two functionality-based segments. In a final home-use test, the members of the functionality-based segments (n=91) prepared and evaluated the tailored PE meal concepts.


The emotion-based approach resulted in four clusters; pleasurable averages, adventurous arousals, convivial indulgers, and indifferent restrictives. These emotions that these segments associated with their mealtimes varied along the two dimensions valence and arousal. However, from both CLTs we learned that the variation in valence-arousal as observed for mealtime-related emotions was not observed for emotions related to actual foods. The latter makes it challenging to identify products that evoke emotions congruent to the mealtime expectations of the emotion-based clusters.

With regard to the functionality-based approach, we encountered three clusters; physical nutritioners, cosy socialisers, and thoughtless averages. The cosy socialisers value the social interactions and cosiness during their mealtimes, whereas the physical nutritioners focus more on the health and nutrient aspects of meals. Thoughtless averages have the least distinctive mealtime expectations. We translated these functional mealtime expectations into two PE meal concepts; one tailored to cosy socialisers and one tailored to physical nutritioners. These meal concepts were well-accepted by the participants. However, congruency between mealtime expectations and functional meal associations did not result in a better ‘product-cluster fit’.


Given the challenge to identify congruency between the meal associations and the mealtime expectations of the emotion-based clusters, we consider the emotion-based approach to be not yet actionable enough as a basis for tailoring PE products to older consumers. In contrast, the functionality-based approach appeared to be more promising, since the functional meal expectations could be translated to well-accepted tailored PE meal concepts. However, the effectivity of our functionality-based approach was not yet confirmed in this thesis, since congruency between functional meal associations and functional meal expectations did not necessarily result in a better ‘product-cluster fit’. Future studies, focussing on e.g. other meal types, are recommended to further explore mealtime functionality as a basis for tailoring PE meals to older consumer subgroups.

Measurement errors in dietary assessment using duplicate portions as reference method
Trijsburg, L.E. - \ 2016
University. Promotor(en): Pieter van 't Veer; Anouk Geelen; Jeanne de Vries. - Wageningen : Wageningen University - ISBN 9789462576421 - 128 p.
diet studies - nutritional assessment - questionnaires - reference standards - correction factors - validity - body mass index - regression analysis - food intake - food - protein - potassium - sodium - energy intake - methodology - dieetstudies - voedingstoestandbepaling - vragenlijsten - referentienormen - correctiefactoren - geldigheid - quetelet index - regressieanalyse - voedselopname - voedsel - eiwit - kalium - natrium - energieopname - methodologie

Measurement errors in dietary assessment using duplicate portions as reference method

Laura Trijsburg

Background: As Food Frequency Questionnaires (FFQs) are subject to measurement error, associations between self-reported intake by FFQ and outcome measures should be corrected for measurement error with data from a reference method. Whether the correction is adequate depends on the characteristics of the reference method used in the validation study. The duplicate portion method (DP), compared to the often used 24h recall (24hR), seems a promising reference method as correlated errors between FFQ and DP, such as memory bias, errors in portion size estimations and food composition databases, are not expected.

Aim: This thesis aimed to determine the validity of the DP compared to the 24hR as a reference method for FFQ validation. The second aim was to explore the validity of nutrient densities for DP, 24hR and FFQ. The third aim was to determine the factors associated with misreporting of energy, protein and potassium as estimated by DP, 24hR and FFQ.

Methods: Within the DuPLO-study, a Dutch validation study which is part of the NQplus study, two DPs, two FFQs, two blood and urinary biomarkers and one to fifteen 24hRs (web-based and/or telephone-based) were collected in 198 subjects, within 1.5 years. Also, one or two doubly labelled water measurements were available for 69 participants. Multivariate measurement error models were used to assess proportional scaling bias, error correlations with the FFQ, validity coefficients and attenuation factors. Furthermore linear regression analysis was used to determine the association between misreporting and various factors.

Results: The DP was less influenced by proportional scaling bias, had lower correlated errors with the FFQ and showed higher attenuation factors than the 24hR for potassium, sodium and protein. Also, the DP seemed a better reference method than the 24hR for the assessment of validity coefficients for the FFQ for various fatty acids. The attenuation factors for the FFQ, using either the DP or 24hR as reference method, agreed reasonably well. Furthermore, the DP showed, when using plasma fatty acids as reference, slightly better ranking of participants according to their intake of n-3 fatty acids (0.33) and the n‑3/LA ratio (0.34) than the 24hR (0.22 and 0.24, respectively). Less group level bias was observed for protein and sodium densities compared to their absolute intakes for FFQ, 24hR and DP, but not for potassium. Overall the validity coefficients and attenuation factors for DP, 24hR and FFQ did not improve for nutrient densities compared to absolute intakes, except for the attenuation factor for sodium density. Lastly, BMI proved to be the most consistent determinant associated with misreporting (group level bias) of energy, protein and potassium for DP, 24hR and FFQ. Men tended to underreport protein by the DP, FFQ and 24hR and persons of older age underreported potassium but only by the 24hR and FFQ. Other explorative determinants did not show a consistent association with misreporting of energy or nutrients by the different dietary assessment methods.

Conclusion: With respect to error correlations and attenuation factors the DP performed slightly better than the 24hR as a reference method for validating FFQs in epidemiological research. Furthermore, the use of nutrient densities does not necessarily improve the validity of the dietary intake estimates from DP, 24hR and FFQ. Moreover, it was shown that BMI is an important determinant of misreporting of energy, protein and potassium for these three assessment methods.

Agenda stadslandbouw. Impact op initiatieven
Veen, E.J. ; Jansma, J.E. - \ 2015
collectieve overeenkomsten - stadslandbouw - gemeenten - openbare mening - steden - stedelijke planning - vragenlijsten - collective agreements - urban agriculture - municipalities - public opinion - towns - urban planning - questionnaires
In het voorjaar van 2013 bracht het Stedennetwerk Stadslandbouw (een landelijk netwerk van pioniers in de stadslandbouw, zie de Agenda Stadslandbouw naar buiten. Groningen was de eerste die ondertekende, inmiddels gevolgd door 25 andere gemeenten. Met de ondertekening committeren gemeenten zich aan het stimuleren en faciliteren van stadslandbouw. In 2014 hebben we bij twaalf ondertekenaars verkend wat het ondertekenen van de agenda voor de gemeente heeft betekend. De resultaten van deze verkenning zijn terug te vinden in de brochure ‘Agenda Stadslandbouw. Wat was de impact?’. Graag wilden we ook nagaan wat de agenda betekend heeft voor andere betrokkenen bij stadslandbouw. In een vervolgonderzoek richtten we ons daarom op de partijen ‘buiten het stadhuis’. Doel was te inventariseren wat de impact van de agenda voor stadslandbouwinitiatieven zélf is geweest.
What reported food-evoked emotions may add: A model to predict consumer food choice
Gutjar, S. ; Dalenberg, J.R. ; Graaf, C. de; Wijk, R.A. de; Palascha, A. ; Renken, Remco J. ; Jager, G. - \ 2015
Food Quality and Preference 45 (2015). - ISSN 0950-3293 - p. 140 - 148.
consumption experience - responses - satisfaction - liking - taste - package - questionnaires - behavior - design - impact
Food-evoked emotions provide information that goes beyond the information from traditional hedonic ratings. The objectives of our study were: (i) to investigate how intrinsic (sensory) and extrinsic (packaging) cues affect consumers’ emotional responses to foods, and (ii) to explore whether emotional responses to these cues combined with liking, predict actual food choice. Participants (n = 103) rated emotional responses to seven products under a blind taste, a package and a package and taste condition using the EsSense Profile™. During the blind taste condition participants also scored liking of the products. Test products were breakfast drinks and desserts. Food choice was measured in two different breakfast sessions reflecting a different choice context. In one choice context, products were presented blind to taste, after which participants chose one out of the seven foods to consume for breakfast. In the other choice context, participants based their choice on the package of the seven foods without tasting them. Results showed that emotions evoked by food products could be organised in a two-dimensional space, representing a valence (pleasantness) and an activation/arousal dimension. Specific emotional profiles generated for products differed across the blind taste, package and the package and taste condition, meaning that intrinsic and extrinsic product properties elicit in part different emotions. Liking and valence together had the strongest predictive value for product choice based on the product’s taste. The combination of liking, valence and arousal had the strongest predictive value for package-based choice. In conclusion, food-evoked emotions add predictive value to solely liking ratings, and may guide consumers’ product choice behaviour.
Bodemverbetering: vooral traditioneel
Pronk, A.A. ; Hijbeek, R. ; Praktijkonderzoek Plant & Omgeving, - \ 2015
Boerderij 100 (2015)20. - ISSN 0006-5617 - p. A14 - A15.
akkerbouw - bodemkwaliteit - opbrengst - landbouw en milieu - groenbemesters - compost - gereduceerde grondbewerking - rijpadensysteem - digestaat - vragenlijsten - arable farming - soil quality - outturn - agriculture and environment - green manures - composts - reduced tillage - controlled traffic farming - digestate - questionnaires
Akkerbouwers tonen grote belangstelling voor verbetering van bodemkwaliteit. Dat blijkt uit een enquête in het kader van het EU-project Catch-C. In dit artikel wordt een aantal punten die in de enquete naar voren komen, besproken: toepassing van groenbemesters; gebruik compost; niet-kerende grond; vaste rijpaden; het gebruik van digestaat.
Comparison of approaches to correct intake-health association for FFQ measurement eroor using a duplicate recovery biomarker and a duplicate 24h dietary recall as reference method
Geelen, A. ; Souverein, O.W. ; Busstra, M.C. ; Vries, J.H.M. de; Veer, P. van 't - \ 2015
Public Health Nutrition 18 (2015)2. - ISSN 1368-9800 - p. 226 - 233.
episodically consumed foods - european centers - urinary nitrogen - potassium intake - validation - cancer - nutrition - protein - questionnaires - individuals
Objective To illustrate the impact of intake-related bias in FFQ and 24 h recall (24hR), and correlated errors between these methods, on intake–health associations. Design Dietary intake was assessed by a 180-item semi-quantitative FFQ and two 24hR. Urinary N and urinary K were estimated from two 24 h urine samples. We compared four scenarios to correct associations for errors in an FFQ estimating protein and K intakes. Setting Wageningen, The Netherlands. Subjects Fifty-nine men and fifty-eight women aged 45–65 years. Results For this FFQ, measurement error weakened a true relative risk of 2·0 to 1·4 for protein and 1·5 for K. As compared with calibration to duplicate recovery biomarkers (i.e. the preferred scenario 1), estimating a validity coefficient using this duplicate biomarker resulted in overcorrected associations, caused by intake-related bias in the FFQ (scenario 2). The correction factor based on a triad using biomarkers and 24hR was hampered by this intake-related bias and by correlated errors between FFQ and 24hR, and in this population resulted in a nearly perfect correction for protein but an overcorrection for K (scenario 3). When the 24hR was used for calibration, only a small correction was done, due to correlated errors between the methods and intake-related bias in the 24hR (scenario 4). Conclusions Calibration to a gold standard reference method is the preferred approach to correct intake–health associations for FFQ measurement error. If it is not possible to do so, using the 24hR as reference method only partly removes the errors, but may result in improved intake–health associations.
Draagvlak en betrokkenheid van burgers bij natuur en natuurbeleid
Boer, T.A. de; Blaeij, A.T. de; Elands, B.H.M. ; Bakker, E. de; Koppen, C.S.A. van; Buijs, A.E. - \ 2014
Wageningen : Wettelijke Onderzoekstaken Natuur en Milieu (WOt-paper 35)
maatschappelijk draagvlak - natuurbeleid - vragenlijsten - burgers - attitudes - inventarisaties - public support - nature conservation policy - questionnaires - citizens - inventories
Deze WOt-paper beschrijft de resultaten van de publieksenquête ‘Draagvlak voor natuur en natuurbeleid 2013’ en vergelijkt de uitkomsten met eerdere publieksenquêtes over dit onderwerp. Het is namelijk de vierde keer sinds 1996 dat zo’n enquête is uitgevoerd. Daarbij wordt aan een representatieve groep Nederlanders gevraagd hoe zij de natuur waarderen en gebruiken, hoe ze denken over het natuurbeleid en beleidsmaatregelen en in hoeverre ze betrokken zijn bij de natuur in hun dagelijkse bestaan. Het Planbureau voor de Leefomgeving (PBL) heeft opdracht gegeven voor dit onderzoek. De kennis die deze longitudinale onderzoeken oplevert, helpt het ministerie van Economische Zaken, decentrale overheden en het maatschappelijk middenveld om het natuurbeleid beter aan te laten sluiten bij wat de burger belangrijk vindt.
The impact of evoked consumption contexts and appropriateness on emotion responses
Piqueras Fiszman, B. ; Jaeger, S.R. - \ 2014
Food Quality and Preference 32 (2014)Part C. - ISSN 0950-3293 - p. 277 - 288.
food experience - acceptability - choice - questionnaires - ratings - package - design
Sensory and consumer scientists are seeing the need to explore broader measures, such as product-driven emotions, to be able to fully understand and satisfy consumers’ demands. However, to date, the consumer methodologies used in food-related emotion research have neglected a crucial element linked to emotions: the consumption context. This is a concern, because consumers’ emotional responses to food are elicited by many other sources apart from the sensory properties of the food itself. The present research aimed to fill in this gap of knowledge by exploring how evoked consumption contexts affect responses obtained from an emotion questionnaire. Two food stimuli (apple and chocolate brownie) and three different consumption contexts (a ‘weekend breakfast’, an ‘afternoon snack’, and ‘after a special dinner’) were used to vary the level of product-context appropriateness. A within-subject design was used in which 157 participants first completed an emotion questionnaire (36 terms, checklist format) in response to each of the evoked consumption contexts (presented in written format). A week later, the same participants completed the same emotion questionnaire while imagining themselves eating an apple or chocolate brownie (shown as images) without any given context (control condition), and then under the three different contexts (random monadic sequential order). When the chocolate brownie was the food stimulus, 20 of 36 emotion responses were significantly different from context to context (including the no-context condition). Conversely, only 9 significant differences were established when apple was the food stimulus. It was also found that frequency of use of positive emotion terms was higher in those consumption contexts that were considered more appropriate, whereas negative emotion terms were more frequently selected when the context was perceived as less appropriate for the product. Taken together, these findings highlight how the context in which a food is consumed (even if imagined) can affect consumers’ emotion responses towards it. More broadly, they demonstrate the reciprocal effect that the context and the product have on the elicited emotion responses, which are not situationally invariant. This research also explored how psychological traits related to emotional eating affected the emotion responses and found that in general higher emotional eaters selected a higher number of emotion terms (positive and negative). This study represents a needed advance in food-related emotion research, and upon replication of the results with other product-context combinations, could offer an easy-to-implement methodology that should more closely match the emotion responses that consumers would elicit in real-life situations while eating and drinking.
The impact of the means of context evocation on consumers' emotion associations towards eating occasions
Piqueras Fiszman, B. ; Jaeger, S.R. - \ 2014
Food Quality and Preference 37 (2014). - ISSN 0950-3293 - p. 61 - 70.
evoked consumption contexts - imagery - appropriateness - responses - questionnaires - satisfaction - attributes - experience - validity - ratings
The joint investigation of the product, the consumer, and the consumption context is necessary for furthering the understanding of eating occasions (snacks and main meals), including their construction and enjoyment. The study of people’s experience of eating occasions is less advanced than the understanding of acceptability, preference, and choice of individual food/beverage items and/or their combination in meals. The current research contributes to narrowing this gap by focusing on emotions as a dimension of eating experiences and enjoyment. Under evoked consumption contexts (breakfast, lunch, afternoon snack, dinner), the emotion associations for several products (potato crisps, chocolate brownie, and kiwifruit) were obtained from consumers (n = 399) using a questionnaire method. Emotion associations were explored in relation to: (1) the way in which the food stimulus was evaluated by participants (tasting food vs. seeing a food image); (2) the serving presentation of the food stimulus (image of food shown in isolation vs. image of food served on a plate with cutlery); and (3) the means in which the consumption context was evoked (written vs. written and pictorial). Consumers’ product emotion associations when tasting a food stimulus vs. seeing an image of the same food were highly similar. There was some evidence that more specific means of presenting the food stimuli (with tableware vs. without tableware) and consumption contexts (written and pictorially vs. written only) influenced perceived appropriateness of the product in the focal consumption context. This resulted, for example, in a higher frequency of use of negative emotion terms in the less appropriate consumption contexts. Overall, through the use of evoked consumption contexts this research has contributed new understanding of product-specific emotional associations during eating occasions from a methodological approach. In addition to the aforementioned results a more general finding was the apparent reliance by participants on past product experiences when completing the emotion questionnaire.
Emotion responses under evoked consumption contexts: A focus on the consumers’ frequency of product consumption and the stability of responses
Piqueras Fiszman, B. ; Jaeger, S.R. - \ 2014
Food Quality and Preference 35 (2014). - ISSN 0950-3293 - p. 24 - 31.
food acceptability - choice - appropriateness - questionnaires - preferences - experience - ratings
Previous research has demonstrated that the context in which a certain food is consumed (even if imagined) can affect consumers’ associative emotional responses to that product. In three separate studies we extended this line of research by: (1) replicating these previous findings with consumers from another country and another product category; (2) investigating the impact of participants’ product consumption frequency on their associative emotional responses; and (3) examining whether the emotional associations involved in eating certain products in evoked contexts are stable through time. The results of this work support previous findings demonstrating the impact of the consumption context (and its perceived appropriateness) on consumers’ reported emotional associations with a food product, and that this result is generalizable across nationalities. We also confirm that the associative emotion profiles of more emotion-laden product categories (in comparison with more neutral ones; e.g. chocolate vs. fruit) are more variable between contexts. In addition, the emotional associative profiles obtained from two groups of participants that were either high or low frequent consumers of the food stimuli did not differ to any significant extent. Finally, the emotion responses provided under evoked consumption contexts seemed to be consistent (stable) across time. Taken together, this study strengthens the rationale for evoking consumption contexts during emotion-related tasks, demonstrating that this methodology provides repeatable results and insights that go beyond the product and the consumer. Keywords Emotion responses; Consumption context; Appropriateness; Consumer research; Stability; Frequency of consumption
Natuurbezoek en preventiegedrag ziekte van Lyme
Putten, M.J. van; Poortvliet, P.M. ; Vliet, A.J.H. van - \ 2014
Landschap : tijdschrift voor Landschapsecologie en Milieukunde 31 (2014)4. - ISSN 0169-6300 - p. 223 - 229.
natuurgebieden - actieve recreatie - menselijk gedrag - ziektedistributie - lyme-ziekte - opinies - vragenlijsten - natural areas - active recreation - human behaviour - disease distribution - lyme disease - opinions - questionnaires
Met een enquête is onderzocht welke factoren een rol spelen bij de bereidheid van natuurbezoekers om preventieve maatregelen te willen nemen tegen tekenbeten.
Maatschappelijk draagvlak voor natuur en natuurbeleid in 2013
Boer, T.A. de; Blaeij, A.T. de; Elands, B.H.M. ; Bakker, H.C.M. de; Koppen, C.S.A. van; Buijs, A.E. - \ 2014
Wageningen : Wettelijke Onderzoekstaken Natuur & Milieu, Wageningen UR (WOt-rapport 126) - 83
natuurbeleid - maatschappelijk draagvlak - vragenlijsten - burgers - attitudes - inventarisaties - nature conservation policy - public support - questionnaires - citizens - inventories
In dit rapport staan de resultaten van de publieksenquête Draagvlak voor natuur en natuurbeleid 2013 die gehouden is onder een representatieve groep Nederlanders. Uit deze longitudinale studie blijkt dat een grote groep burgers natuurbescherming belangrijk vindt, regelmatig de natuur bezoekt en activiteiten verricht voor natuur en landschap. Slechts een beperkte groep is actief betrokken bij burgerinitiatieven voor natuur in de woonomgeving. In vergelijking met de voorgaande enquête uit 2006 is het draagvlak voor beleidsmaatregelen iets afgenomen. Verder zijn mensen positiever geworden over de hoeveelheid natuur in Nederland en bezoekt men vaker de natuur
Vegte, Zwier van der - \ 2013
grassland management - fertilizer application - sowing date - calves - green manures - questionnaires
Beleving van weidevogelproblematiek in Nederland, Bevindingen publieksenquête
Langers, F. ; Goossen, C.M. - \ 2013
Wageningen : Alterra, Wageningen-UR - 44
weidevogels - natuurbeleid - natuurbescherming - melkveehouderij - burgers - opinies - vragenlijsten - maatschappelijke betrokkenheid - inventarisaties - grassland birds - nature conservation policy - nature conservation - dairy farming - citizens - opinions - questionnaires - community involvement - inventories
Doel van deze studie is om meer begrip te krijgen van de onderliggende ethische visies en emoties die leven onder de Nederlandse bevolking bij maatschappelijke discussies over de omgang met weidevogels in Nederland. Door te focussen op de visies onder het grote publiek kunnen kritische geluiden van maatschappelijke organisaties en individuele actievoerders ook in een breder maatschappelijk perspectief worden gezet, inclusief het draagvlak voor enerzijds het beleid en anderzijds voor kritische geluiden over het beleid.
Health sector costs of self-reported food allergy in Europe: a patient-based cost of illness study
Mugford, M. ; Fox, M. ; Voordouw, J. ; Cornelisse-Vermaat, J.R. ; Antonides, G. ; Hoz Caballer, B. de la - \ 2013
European Journal of Public Health 23 (2013)5. - ISSN 1101-1262 - p. 757 - 762.
prevalence - questionnaires - consumers
Introduction: Food allergy is a recognized health problem, but little has been reported on its cost for health services. The EuroPrevall project was a European study investigating the patterns, prevalence and socio-economic cost of food allergy. Aims: To investigate the health service cost for food-allergic Europeans and the relationship between severity and cost of illness. Methods: Participants recruited through EuroPrevall studies in a case–control study in four countries, and cases only in five countries, completed a validated economics questionnaire. Individuals with possible food allergy were identified by clinical history, and those with food-specific immunoglobulin E were defined as having probable allergy. Data on resource use were used to estimate total health care costs of illness. Mean costs were compared in the case–control cohorts. Regression analysis was conducted on cases from all 9 countries to assess impact of country, severity and age group. Results: Food-allergic individuals had higher health care costs than controls. The mean annual cost of health care was international dollars (I$)2016 for food-allergic adults and I$1089 for controls, a difference of I$927 (95% confidence interval I$324–I$1530). A similar result was found for adults in each country, and for children, and was not sensitive to baseline demographic differences. Cost was significantly related to severity of illness in cases in nine countries. Conclusions: Food allergy is associated with higher health care costs. Severity of allergic symptoms is a key explanatory factor.
Duurzaam Regionaal Voedsel bij gemeenten : resultaatmeting naar beleidsontwikkeling voor duurzaam regionaal voedsel bij gemeenten
Agricola, H.J. ; Fontein, R.J. ; Stuiver, M. - \ 2013
Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2412) - 21
voedselvoorziening - duurzaamheid (sustainability) - plaatselijk bestuur - vragenlijsten - participatie - inventarisaties - regionale voedselketens - food supply - sustainability - local government - questionnaires - participation - inventories - regional food chains
In opdracht van het ministerie van EZ is een enquête uitgevoerd onder Nederlandse gemeenten om inzicht te krijgen in hoeveel gemeenten anno 2012 betrokken zijn bij regionale voedselinitiatieven en hoeveel gemeenten een actief voedselbeleid hebben ontwikkeld of dat van plan zijn te gaan doen. Uit de enquête blijkt dat 72% van de gemeenten initiatieven van Duurzaam Regionaal Voedsel ondersteunt, 10% van de gemeenten heeft een beleid of visie voor Duurzaam Regionaal Voedsel. Van de gemeenten die nog geen beleid hebben, zegt 26% dit in de toekomst te willen gaan doen. Kennisvragen die bij gemeenten spelen hebben vooral betrekking op de behoefte aan praktijkvoorbeelden over hoe gemeenten en private partijen gezamenlijk initiatieven van Duurzaam Regionaal Voedsel kunnen ontwikkelen en implementeren.
The Connect4Action Delphi study: report of the round 1 outcomes (Deliverable 3.1)
Raley, M. ; Ragona, M. ; Sijtsema, S.J. ; Frewer, L.J. - \ 2013
Wageningen : Wageningen UR (Connect4Action D 3.1) - 42
consumenten - voedseltechnologie - communicatie - nieuwe voedingsmiddelen - aanvaardbaarheid - consumentenonderzoeken - vragenlijsten - consumers - food technology - communication - novel foods - acceptability - consumer surveys - questionnaires
This deliverable reports on a first round Delphi survey conducted in autumn 2012. The survey asks participants ‘to articulate key priorities, preferences and identify perceived barriers to inclusion of consumer science data regarding technology acceptance into product development’ (DoW, p22). In all 75 usable responses were received to an on-line questionnaire. The survey identified three critical points of communication which influence whether commercialisation is successful: 1. Communication with consumers to determine their preferences so that products produced using a new food technology will be developed and purchased by them. 2. Communication with consumers to inform them about new food technologies to prevent subsequent rejection of resultant products. 3. Communication between actors in the chain extending from technology development to retail. The main communication difficulty results from inter-disciplinary differences, as key actors have different goals, different mind-sets, use different methods and terminology, and may have a low awareness of what others try to do.
Tuinbouwtoeleveranciers veroveren de wereld
Baltussen, W.H.M. ; Smit, P.X. - \ 2013
Den Haag :
markten - internationale handel - internationale economie - tuinbouw - globalisering - vragenlijsten - landbouwsector - glastuinbouw - markets - international trade - international economy - horticulture - globalization - questionnaires - agricultural sector - greenhouse horticulture
De aanleiding voor dit onderzoek is een gebrek aan actuele informatie over de internationale markt van tuinbouwtoeleveranciers. In deze publicatie is vooral aan de hand van informatie van de bedrijven zelf een beeld gegeven van de economische betekenis van de sector, de actuele duurzaamheidthema’s en de samenwerkingsvormen. Hiertoe is in 2012 op verzoek van AVAG Plus onder de leden van brancheverenigingen AVAG, VPN, OVTO en VTTB een enquête uitgevoerd door LEI Wageningen UR.
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