categorical imperative

the moral directive articulated by Immanuel Kant that one’s behavior should be guided by maxims that one would be comfortable to hold as universal laws governing the actions of all people in the same circumstances. Because it is absolute and unconditional, the categorical imperative contrasts with a hypothetical imperative of the type “If you would achieve end Y, take action Z.” The categorical imperative has been extremely influential in moral philosophy and in theories of moral behavior in psychology. See also universalizability.

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Psychology term of the day

March 12th 2025

sequence effect

in within-subjects designs, a difference in scores that emerges because of a particular arrangement of treatments—that is, the presentation of one level of the independent variable has an effect on responses to another level of that variable. A researcher can test for a sequence effect by administering the treatments in various different arrangements (e.g., the arrangement ABC vs. ACB, vs. BCA, and so forth). The sequence effect is not to be confused with the order effect.