Which of the following occurrences do ESP researchers regard as evidence that parapsychological skills are very fragile,while ESP skeptics regard it as evidence that the ESP demonstration was just a run of luck?
A) stroboscopic movement
B) the Barnum effect
C) the decline effect
D) successful replication of the ESP experiment

Question

Quizplus · Accepted Answer

The decline effect refers to the phenomenon where the effect size of a particular phenomenon decreases over time with repeated trials. ESP researchers often view this as evidence that the parapsychological skills being tested are fragile and prone to decline with repeated testing. However, skeptics argue that this effect is simply due to chance and that the initial positive results were just a run of luck.

Which of the Following Occurrences Do ESP Researchers Regard as Evidence