Recap on the difference between reliability and validity inresearch. Can a research result be reliable but not valid?Can a research result be valid but not reliable?And Consider the scenarios below. What potential design problems can you identify within each scenario? What improvements would you suggest?

1. A tennis club is interested in determining how it is perceived in terms of image amongst its users. They call a random selection of users from their new members list and ask each person a series of questions.

2. A university lecturer wants to find out about how people under 25 years old make educational choices. She asks each of his tutorial classes to complete a survey, offering a 1% bonus grade for anyone who completes the survey.

3. Jetty Surf in Adelaide, is interested in why people go scuba diving and snorkelling, often they go and what equipment and clothing they wear. They plan to send a single mailout questionnaire to 5,000 households in Adelaide.