| A | B |
|---|
| ATTRITION | the loss of subjects over time, a problem for longitudinal designs |
| CLOSED ENDED | questions which are structured and lead to quantifiable responses |
| CHECKLIST | a list of adjectives from which the subject marks those which apply |
| CROSS-SECTIONAL | a separate groups design comparing different cohorts |
| INTERVIEW | an oral interaction between the researcher and subject |
| QUESTIONNAIRE | a structured series of questions, usually with closed ended answers |
| LIKERT | a scale for measuring agreement with an attitude |
| LONGITUDINAL | a repeated measures design studying the same cohort over time; susceptible to problems with attrition |
| PILOT | an initial study to see if the questions result in valid and quantifiable responses from the population |
| COHORT | a population born around the same time |
| CEILING EFFECT | when a performance test is too easy and everyone scores are all high |
| FLOOR EFFECT | when the test is too hard and everyone scores low |
