3. A researcher investigated the effect of a child\'s hair length on judgments o

Question

3.  A researcher investigated the effect of a child's hair length on judgments of personality and intelligence. Teachers were shown photographs of children to obtain their "first impressions" of the children. Each teacher was shown 6 pictures of boys and girls whose hair was either very short, shoulder length, or very long (one picture of each type). Teachers rated the friendliness of each child and estimated each child's intelligence level.

1. Identify the design (e.g., 2 X 2 factorial).

2. Identify the total number of conditions.

3. Identify the independent variable(s) and levels (this could include PVs).

4. Is this an IV X PV design? If so, identify the participant variable(s).

5. Is this a repeated measures (within subject) design? If so, identify the repeated variable(s). And/Or

6. Identify the dependent variable(s).

Explanation / Answer

In the above example, the experimenter is trying to investigate the effect of a child's hair length on judgments of personality and intelligence. The child's hair length in the photographs is either very short, shoulder length, or very long. Child's hair length is the independent variable which in this case is manipulated in three ways to see its effect on teachers' judgments of personality and intelligence.

The experimental design used above is the correlation method. Correlation is a cause and effect method which is used to understand the effect of independent variable on the dependent variable. The researcher in the above study wants to understand the effect a child's hair length (independent variable) on judgments of personality and intelligence. The teachers are the dependent variable.

There are three different conditions of hair length; very short, shoulder length, or very long . The above study is a within subject design. It is a within subject design because each teacher was shown 6 pictures of boys and girls whose hair was either very short, shoulder length, or very long (one picture of each type).

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