1. Apple vs Samsung Tablets Time Completion & Word Count Amaryllis Mavragani & Konstantinos Tsagarakis Business and Environmental Technology Lab Environmental Engineering Department, Democritus University of Thrace

2. Mobile mode surveys  Easier  Faster  Less costly  Wider respondents sets

3. Web Survey Design  No agreed questionnaire layout  Combine effective features to obtain valid results

4. Aims  Create a questionnaire with effective features  User-friendly  Time completion rates & word count scorings  Differences in Apple & Samsung tablets

5. Tablets  iPad Air  iPad mini  Samsung Glx Tab 10.1  Samsung Glx Tab 7

6. Tablets  Similar features and prizes for similar sized tablets  All cases removed

7. Tablets

8. Questionnaire  16 questions  2 demographic (sex, age)  14 on Open Economy Institutional Quality & Sustainability  A total of 4 pages

9. Questionnaire  Two open-ended questions with a soft reminder  Same box-size  Radio button answers placed on the left  Hard reminder for the rest of the questions  Including DK option

10. Questionnaire  Age box smaller than the ones for definitions  Use of progress indicators (short survey)  No images, examples or definitions  Font size, color & placement consistent

11. Participants  Undergrads (Environmental Eng. Dept)  Ages between 21 & 26  52 were asked to participate  2 denied/5 breakoffs  A total of 45 valid responses

12. Participants  Survey conducted in our lab  Participants not allowed to communicate  Sensitive questions (e.g. political orientation)  Same email invitation used to ensure anonymity

13. Descriptive Statistics

14. Results

15. Results

16. Results Samsung 7 achieves the best scores in both categories  Small size  Rectangular shape  Better grip

17. Conclusions Time Completion Ranks ① Samsung 7 ② iPad Air ③ Samsung 10 ④ iPad mini

18. Conclusions Word Count Ranks ① Samsung 7 ② iPad mini ③ Samsung 10 ④ iPad Air

19. Future Research  Page time completion  Same device with and without a case  Include videos (device performance)  Increase noise levels

20. Thank you