At a youth theatre rehearsal, two psychology students sit in different parts of the room and each completes the same behaviour checklist independently. One category on the checklist is "is helpful", but the category has no definition or examples. The rehearsal follows the group's normal routine. After the rehearsal, the students compare their tallies.
State the type of reliability shown by how closely the two sets of tallies agree.
Suggest one change to the procedure that could make the two sets of tallies more consistent.
Give one reason why carrying out the observation during the group's normal rehearsal could improve ecological validity.
173 exam-style questions on OCR GCSE Psychology 7.3 Analysing Research, covering 7.3.1 Types of Data, 7.3.2 Measures of central tendency, 7.3.3 Other descriptive statistics, 7.3.4 Tables, Charts and Graphs, 7.3.5 Reliability, 7.3.6 Validity and effects on validity, and 7.3.7 Sources of bias. Each one has a worked solution and a mark scheme showing where the marks go.