A psychologist investigates whether noise level affects concentration. Participants in Group 1 read a passage in a room with a continuous low-frequency hum (45 dB45\text{ dB}45 dB), while participants in Group 2 read the same passage in a silent room (0 dB0\text{ dB}0 dB). Concentration is measured by the number of spelling errors detected in a 500-word text within a 10-minute limit.
Which of the following represents the operationalised dependent variable in this study?
The concentration levels of the participants during the reading task.
The number of spelling errors detected in the 500-word text within 10 minutes.
The presence of a low-frequency hum (45 dB45\text{ dB}45 dB) compared to a silent room (0 dB0\text{ dB}0 dB).
The individual baseline reading ability of each participant.
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.