In the Kaufman and Rock (1972) moon illusion example in the text, they hypothesized that there would be no moon illusion in their experiment. Experiments of this type pose problems for researchers because
A) you cannot logically prove the null hypothesis to be true.
B) the null hypothesis is obviously true.
C) rejecting the null hypothesis would mean that Kaufman and Rock were wrong.
D) the null hypothesis is obviously false.

Question

Quizplus · Accepted Answer

In experiments of this type, the null hypothesis is typically that there will be no effect or no difference between groups. It is impossible to logically prove a null hypothesis to be true, only to fail to reject it based on the evidence. Therefore, option A is the correct answer.

In the Kaufman and Rock (1972) Moon Illusion Example in the Text