Lab Worksheet: OPL Experiment Analysis and Interpretation

Experiment: Reaction Time Color

Hypothesis:

This study investigated the effect of the type of decision task on the reaction time to a color stimulus. It is predicted that the most basic decision (simple) to respond to the color will produce faster (lower) reaction times to the stimulus than decision conditions that require either a choice or a decision to respond or not (Go-No Go).

State the significance of the test:Report the statistical result of the analysis in a sentence and include F, p, and eta square values.

For example: There was a significant effect of the drug on depression scores, F(3,22) = 2.55, p = .032, eta squared = .097.

Post hoc interpretation:Describe the results of the analysis in terms of each pairwise comparison from the post hoc analysis

Example: "Mean driving score for driving while drunk (M = 23.20, SD = 2.86) or driving while tired (M = 25.45, SD = 4.01) were significantly higher than mean driving score for driving under normal conditions (M = 16.40, SD = 4.44), demonstrating that driving performance is worse while intoxicated or sleep deprived. Mean driving scores for driving while drunk were not significantly different than mean driving scores for driving while tired demonstrating similar driving performances for the two driving impairment conditions."

Summarize Result:To what extent was the hypothesis supported by the analysis results? Explain.

Copy and paste the descriptive table and plot from the analysis below:

Experiment: Poggendorff Illusion

Hypothesis:

This study investigated the effect of the width of a box and the length of line segments on the ability to accurately place the right diagonal to match the left diagonal on the opposite side of the box. It is predicted that the greater the separation (vertical width) of the diagonals the greater the illusion and the less accuracy of matching the diagonal.The diagonal line is typically misplaced below the corresponding opposite line. Likewise, the longer the diagonal line segments the greater the illusion and less accuracy of the matching diagonal.

State the significance of each effect: Report the statistical result of the analysis in a sentence for each main effect and the interaction effect andinclude F, p, and partial eta square values.

Main effect of Diagonal line length:

Main effect of Vertical separation:

Interaction effect of line length * vertical separation:

Interpretation of effects:Interpret any significant main effects or interactions from the analysis results:

• E.g., The main effect of the drug demonstrates that participants in the drug condition had significantly fewer panic attacks than those in the control group.Anxiety scores were similar for both males and females indicating no main effect of gender. For the interaction effect, women had lower anxiety scores than males for the drug condition, but higher anxiety scores in the placebo condition.

Summarize Result:To what extent was the hypothesis supported by the analysis results? Explain.

Copy and paste the descriptive table and plot from the analysis below"