Statement of the Problem
The purpose of this lab experiment is to examine the in uence of speci c vs. general knowledge of results (KR) on learning a motor skill.
• Bean bag
• Individual Data Sheet
• Group Data Sheet
The objective of this task is to throw a bean bag while blindfolded so that it lands on the bullseye.
Divide into two groups. Group 1 (Speci c KR) receives speci c KR in terms of where the bean bag hits the target (in relation to the bullseye). For example, “You were 6" too long and 8" to the right.” Group 2 (General KR) receives general KR in the form of what direction the error occurred. For example, “You missed to the right and long.”
The target should be placed at on the oor 8m from the taped throwing line. Scores are recorded in the Individual Data Sheet according to the zone in which the bean bag comes to rest, with the inner circle receiving 5 points, the next zone 4 points, and so on with the outer ring receiving a score of 1. Any toss not landing on the target receives a score of 0.
You will work in pairs within each group with one performing the task while the other provides KR according to assigned group, records the score, and retrieves the bean bag. The thrower stands behind the throwing line and puts on the blindfold. The thrower then tosses the bean bag towards the target, using an underhand motion. Each participant receives 15 trials on the task. All trials should be completed for one participant before you switch roles.
1. Using your Individual Data Sheet, calculate the mean score for the last 10 trials.
2. Gather the mean scores from the other participants and record each individual’s score into the Group Data Sheet.
3. Calculate the group means.
4. Create a bar graph at www.onlinecharttool.com/graph?selected_graph=bar to illustrate the group means.
1. Was there a difference in accuracy between the two groups?
2. What do these results suggest about the specificity of KR?