A shift in the response attitude of respondents between two points during data collection is called

A shift in the response attitude of respondents between two measurement points is the conditioning effect.

A reactive effect is a change caused merely by respondents knowing they are being observed.

A maturation effect is a natural change in participants over time such as fatigue or ageing.

A regression effect is the drift of extreme scores toward the mean on repeated testing.

Conditioning arises in panel studies when earlier interviews alter later responses.

It threatens the validity of longitudinal and repeated-measure surveys.