Question: 1.The most common instrumentation method in single-subject research is: testing. the questionnaire. observation. interviewing. 2. The external validity of single-subject research results can be strengthened

1.The most common instrumentation method in single-subject research is:

testing.

the questionnaire.

observation.

interviewing.

2. The external validity of single-subject research results can be strengthened through replication studies involving other individuals.

false

true

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