Descriptive, but not Injunctive, Normative Appeals Increase Response Rates In Web-based Surveys

Background: In an earlier experiment Misra, Stokols, & Marino (2012) found that participants who received a descriptive normative prompt in the message requesting them to complete an online survey were more likely to comply with the request compared to participants who did not receive any normative prompts. Purpose: Building on that earlier study, the present field experiment compared the separate and additive effects of descriptive and injunctive norm- based persuasive messages on response rates of online surveys. We also investigate the influence of email reminders on response rates. Intervention: Participants in an interdisciplinary conference were assigned to one of four groups. The three experimental groups received one of the following messages asking them to complete an online survey that highlighted: (1) a descriptive social norm indicating typical response rates among attendees of prior similar conferences; (2) an injunctive norm appealing them to join fellow participants in completing the survey; or (3) both social norms. The control group received a generic request to complete the online survey without any norm-based appeals. Research Design: This study used an experimental design which afforded a within subjects replication of participants’ assignment to each of two treatment groups and the control prompts for two successive surveys.Data Collection and Analysis: One hundred and twenty nine conference participants were requested to complete an online questionnaire about their experiences of an interdisciplinary conference in Fall 2011, immediately following the conference (Time 1) and then three months later (Time 2). At both time points, participants were given three weeks to complete the online surveys. For both time points, participants who had not completed the survey one week after they were sent the initial request to complete the survey received an e-mail reminder. One week after the first email reminder, participants who had still not answered the survey were sent a second email reminder. Once the online surveys were closed at both time points, response rates were calculated. To evaluate the differences in response rates among the various treatment and control groups at both time points, we conducted one-tailed z-tests for proportions to ascertain the z-scores. Findings: Participants receiving a message highlighting the descriptive social norm when asked to complete an online survey were more likely to comply with the request compared to all the other groups. Additionally, one and two email reminders were found to be effective in improving response rates of online surveys.Keywords: response rate; online surveys; norm-based persuasive messages; descriptive norm; injunctive norm; research on evaluatio

Wild leafy vegetables: A study of their subsistence dietetic support to the inhabitants of Nanda Devi Biosphere Reserve, India

Consumption of greens is a major source of vitamins and micro-nutrients for people using only vegetarian diets rich in carbohydrates. In remote rural settlements where vegetable cultivation is not practiced and market supplies are not organized, local inhabitants depend on indigenous vegetables, both cultivated in kitchen gardens and wild, for enriching the diversity of food. Knowledge of such foods is part of traditional knowledge which is largely transmitted through participation of individuals of households. A total of 123 households in six villages of Nanda Devi Biosphere Reserve buffer zone was surveyed using a schedule to assess the knowledge, availability and consumption pattern of wild leafy vegetables. Quantity estimations were done using regular visits with informants from 30 sample households of the six study villages during the collections. Monetization was used to see the value of wild leafy vegetables harvested during a year. The diversity of wild leafy vegetables being use by the local inhabitants is 21 species belonging to 14 genera and 11 families. This is far less than that being reported to be used by the communities from Western Ghats in India and some parts of Africa. Irrespective of social or economic status all households in the study villages had the knowledge and used wild leafy vegetables. The number of households reported to consume these wild leafy vegetables is greater than the number of households reporting to harvest them for all species except for Diplazium esculentum and Phytolacca acinosa. The availability and use period varied for the species are listed by the users. The study indicated that the knowledge is eroding due to changing social values and non participation of younger generation in collection and processing of such wild leafy vegetables

Descriptive, but not Injunctive, Normative Appeals Increase Response Rates In Web-based Surveys

Background: In an earlier experiment Misra, Stokols, & Marino (2012) found that participants who received a descriptive normative prompt in the message requesting them to complete an online survey were more likely to comply with the request compared to participants who did not receive any normative prompts. Purpose: Building on that earlier study, the present field experiment compared the separate and additive effects of descriptive and injunctive norm- based persuasive messages on response rates of online surveys. We also investigate the influence of email reminders on response rates. Intervention: Participants in an interdisciplinary conference were assigned to one of four groups. The three experimental groups received one of the following messages asking them to complete an online survey that highlighted: (1) a descriptive social norm indicating typical response rates among attendees of prior similar conferences; (2) an injunctive norm appealing them to join fellow participants in completing the survey; or (3) both social norms. The control group received a generic request to complete the online survey without any norm-based appeals. Research Design: This study used an experimental design which afforded a within subjects replication of participants’ assignment to each of two treatment groups and the control prompts for two successive surveys.Data Collection and Analysis: One hundred and twenty nine conference participants were requested to complete an online questionnaire about their experiences of an interdisciplinary conference in Fall 2011, immediately following the conference (Time 1) and then three months later (Time 2). At both time points, participants were given three weeks to complete the online surveys. For both time points, participants who had not completed the survey one week after they were sent the initial request to complete the survey received an e-mail reminder. One week after the first email reminder, participants who had still not answered the survey were sent a second email reminder. Once the online surveys were closed at both time points, response rates were calculated. To evaluate the differences in response rates among the various treatment and control groups at both time points, we conducted one-tailed z-tests for proportions to ascertain the z-scores. Findings: Participants receiving a message highlighting the descriptive social norm when asked to complete an online survey were more likely to comply with the request compared to all the other groups. Additionally, one and two email reminders were found to be effective in improving response rates of online surveys.Keywords: response rate; online surveys; norm-based persuasive messages; descriptive norm; injunctive norm; research on evaluatio