Alteration in performance due to awareness of participation in a study is known as
Alteration in performance due to awareness of participation in a study is known as
(a) Operationalism
(b) Reactivity
(c) Temporal validity posttest-only
(d) Mortality
✅ Correct option: (b) Reactivity
Explanation:
Reactivity refers to changes in participants’ behavior that occur because they know they are being observed or studied. This phenomenon includes the Hawthorne effect, where individuals improve performance simply due to attention. Reactivity threatens internal validity because observed effects may not be due to the independent variable. Using unobtrusive measures and deception can reduce reactivity.
10 Related PPSC Facts:
Reactivity affects behavior. Hawthorne effect is a type of reactivity. Observation alters responses. Blind studies reduce reactivity. Naturalistic observation minimizes effects. Self-report increases reactivity. Reactivity threatens validity. Awareness changes motivation. Placebo effect relates to reactivity. Experimental realism reduces reactivity.