True or False: The law of effect states that "first impressions are lasting".

The law of effect, conceptualized by psychologist Edward Thorndike, fundamentally relates to the principles of reinforcement and the impact of consequences on behavior rather than first impressions. Specifically, it posits that responses followed by satisfying outcomes are more likely to recur, whereas those followed by unpleasant outcomes are less likely to be repeated.

The phrase "first impressions are lasting" does not align with the law of effect; instead, it pertains to social psychology and the significance of initial perceptions in human relationships. This is a distinct concept that does not encompass the mechanics of behavior modification as described in the law of effect.

In the context of fitness, while first impressions can play a role in client relationships or training environments, they do not directly relate to the core principles of behavior change that the law of effect outlines. Thus, the assertion is indeed false, as it conflates a behavioral principle with a social perception idea.