# Identify the statistical design-case 12

Identify the statistical design-case 12

Study the experiment described below and answer these questions:

1. Identify the design.

2 Which statistical test will the experimenter run?

3. When the experimenter will publish his findings, will he report a p value?

A pharmacologist wanted to test the effects of a new drug on general behavioral arousal. He used three hamsters. The measure of arousal was spontaneous running activity in a running wheel. In phase A, he recorded daily wheel turns for 10 days. In phase B, he gave the hamsters the drug daily and recorded their wheel running for 10 days. In the third phase he reintroduced phase A, that is he withdrew the drug and recorded the running activity of the hamsters for 10 days.

Study the experiment described below and answer these questions:

1. Identify the design.

2 Which statistical test will the experimenter run?

3. When the experimenter will publish his findings, will he report a p value?

A pharmacologist wanted to test the effects of a new drug on general behavioral arousal. He used three hamsters. The measure of arousal was spontaneous running activity in a running wheel. In phase A, he recorded daily wheel turns for 10 days. In phase B, he gave the hamsters the drug daily and recorded their wheel running for 10 days. In the third phase he reintroduced phase A, that is he withdrew the drug and recorded the running activity of the hamsters for 10 days.

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## Comments

## looks like repeated measures

looks like repeated measures ANOVA.

## agree but 3 subjects? You'll

agree but 3 subjects? You'll never find significance.

## df 2? never. No experiments

df 2? never. No experiments like this in real life.

## "small-n design", no

"small-n design", no statistical analysis.

## small n design

small n design

## BF Skinner -- no stàts

Small n designs

## Nonsense, who is skinner?

Nonsense, who is skinner?

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