The post-test-only control group design avoids

ANon-cooperative participants

BSensitization of participants ✓ Correct

CGroup comparison

DExperimental treatment

Correct answer: (B) Sensitization of participants

Explanation

The post-test-only control group design avoids sensitisation of participants by omitting any pretest.

A pretest can alert or cue participants and bias their later responses.

It does not avoid non-cooperative participants, which is unrelated to design choice.

It still retains group comparison between the experimental and control groups.

It also still applies the experimental treatment to the experimental group.

Randomisation makes the two groups comparable without needing a pretest.

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