Lab 8.1 Effects of Various Sensory Deficits on Motor Skills
8
Human Motor Development
Effects of Various Sensory Deficits on Motor Skills
Lab 8.1
Purpose To experience the effects of various sensory deficits on human motor skill performance, including: 1. Loss of peripheral vision (glaucoma) 2. Cloudy vision (cataracts) 3. Loss of cutaneous receptors.
Procedures Condition 1. Loss of peripheral vision This first task is designed to simulate a loss of peripheral vision. • Work with a partner, standing 10 yards apart. • The experimenter tosses a tennis ball toward the participant at head level and approximately one-foot lateral to the non-dominant side of the body. Repeat 10 times. • Record the participant’s number of successful catches out of the 10 catching attempts. • Now repeat the task, but this time remove peripheral vision of the participant’s non-dominant catching hand. To achieve this, the participant should hold (using dominant hand) a sheet of cardboard measuring approximately 8 inches by 11 inches, against the non-dominant side of the face at eye level. This arrangement will keep the participant from visually seeing the catching hand when attempting to catch the tossed tennis ball. • Record the participant’s number of successful catches out of the 10 catching attempts. • Calculate the percent change to compare the total number of successful catching attempts between the two conditions. • After the tasks have been completed, the partners should switch roles. Condition 2. Cloudy vision This second task is designed to simulate cloudy vision. In this task you will again work with a partner, performing the same tennis ball catching task as described in Condition 1. However, this time, while attempting to catch the ten tossed balls, the participant will be required to wear a pair of work goggles 1
Lab 8.1
Human Motor Development
Lab 8.1 Procedure, continued with Vaseline smeared on the lenses. •
Working in pairs, stand 10 yards apart.
•
The experimenter tosses a tennis ball toward the participant at head level and approximately one-foot lateral to the non-dominant side of the body. The participant attempts to catch the ball. Repeat 10 times.
•
Record the participant’s number of successful catches out of the 10 catching attempts.
•
Now repeat the task with the participant wearing the pair of Vaseline-smeared goggles.
•
Record the participant’s number of successful catches.
•
Calculate the percent change to compare the total number of successful catching attempts between the two conditions.
•
After the two tasks have been completed, the partners should switch roles.
Condition 3: Loss of cutaneous receptors This third task is designed to simulate a loss of cutaneous receptors.
Materials Needed
•
Work in pairs. The participant dribbles a basketball a distance of 20 yards.
•
Tennis ball
•
•
While the participant is dribbling, the experimenter uses a timer to measure how long it takes to dribble the assigned distance.
Cardboard (approximately 8 inches by 11 inches)
•
Goggles
•
Record the time achieved.
•
Vaseline
•
Repeat the timed dribbling task, but this time cover the participant’s dribbling hand with a thick glove (achieving
•
Basketball
•
Glove (the thicker the better)
reduced tactile perception). •
Record the time achieved.
•
Calculate the percent change to compare the time achieved in both conditions.
•
After the two tasks have been completed, the partners should switch roles.
Compiling group data •
On a blank sheet of paper, record the percent change in successful catches and basketball dribble times for the three conditions; do not include your name. One person should gather the papers and compile a list of individual scores for the class and then distribute a copy of the list to each class member.
•
Using Worksheet 8.1B, enter data from the list and calculate the class mean of the percent changes for the three conditions. 2
Lab 8.1
Human Motor Development
WORKSHEET 8.1 A
Effect of Conditions 1, 2, and 3 on Motor Skills Performance— Individual Results
Name: _________________________________________
Date: ____________________
Tennis Ball Catch
Total caught:
Condition 2: Cloudy Vision
Condition 1: Loss of Peripheral Vision
Normal
Total caught:
/10
Percent:
/10
Total caught:
Percent:
Percent:
Percent change:
Percent change:
/10
Basketball Dribbling Condition 3: Loss of Cutaneous Receptors
Normal Time:
Time:
Percent change:
3
Lab 8.1
Human Motor Development
WORKSHEET 8.1 B
Effect of Conditions 1, 2, and 3 on Motor Skills Performance— Group Results
Name: _________________________________________ Participant
Condition 1 Percent Change
Date: ____________________ Condition 2 Percent Change
Condition 3 Percent Change
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Mean:
0
0
0 4
Lab 8.1
Human Motor Development
Discussion 1. Describe how the reduction or removal of sensory receptor input influenced your performance in eac of the three laboratory task conditions.
2. Based on the group data sheet, which of the three conditions had the greatest effect on your class’s motor skill performance?
3. Describe modifications that could be employed as an aid to help individuals with these sensory defici perform more successfully.
5
Human Motor Development
Effects of Various Sensory Deficits on Motor Skills
Lab 8.1
Purpose To experience the effects of various sensory deficits on human motor skill performance, including: 1. Loss of peripheral vision (glaucoma) 2. Cloudy vision (cataracts) 3. Loss of cutaneous receptors.
Procedures Condition 1. Loss of peripheral vision This first task is designed to simulate a loss of peripheral vision. • Work with a partner, standing 10 yards apart. • The experimenter tosses a tennis ball toward the participant at head level and approximately one-foot lateral to the non-dominant side of the body. Repeat 10 times. • Record the participant’s number of successful catches out of the 10 catching attempts. • Now repeat the task, but this time remove peripheral vision of the participant’s non-dominant catching hand. To achieve this, the participant should hold (using dominant hand) a sheet of cardboard measuring approximately 8 inches by 11 inches, against the non-dominant side of the face at eye level. This arrangement will keep the participant from visually seeing the catching hand when attempting to catch the tossed tennis ball. • Record the participant’s number of successful catches out of the 10 catching attempts. • Calculate the percent change to compare the total number of successful catching attempts between the two conditions. • After the tasks have been completed, the partners should switch roles. Condition 2. Cloudy vision This second task is designed to simulate cloudy vision. In this task you will again work with a partner, performing the same tennis ball catching task as described in Condition 1. However, this time, while attempting to catch the ten tossed balls, the participant will be required to wear a pair of work goggles 1
Lab 8.1
Human Motor Development
Lab 8.1 Procedure, continued with Vaseline smeared on the lenses. •
Working in pairs, stand 10 yards apart.
•
The experimenter tosses a tennis ball toward the participant at head level and approximately one-foot lateral to the non-dominant side of the body. The participant attempts to catch the ball. Repeat 10 times.
•
Record the participant’s number of successful catches out of the 10 catching attempts.
•
Now repeat the task with the participant wearing the pair of Vaseline-smeared goggles.
•
Record the participant’s number of successful catches.
•
Calculate the percent change to compare the total number of successful catching attempts between the two conditions.
•
After the two tasks have been completed, the partners should switch roles.
Condition 3: Loss of cutaneous receptors This third task is designed to simulate a loss of cutaneous receptors.
Materials Needed
•
Work in pairs. The participant dribbles a basketball a distance of 20 yards.
•
Tennis ball
•
•
While the participant is dribbling, the experimenter uses a timer to measure how long it takes to dribble the assigned distance.
Cardboard (approximately 8 inches by 11 inches)
•
Goggles
•
Record the time achieved.
•
Vaseline
•
Repeat the timed dribbling task, but this time cover the participant’s dribbling hand with a thick glove (achieving
•
Basketball
•
Glove (the thicker the better)
reduced tactile perception). •
Record the time achieved.
•
Calculate the percent change to compare the time achieved in both conditions.
•
After the two tasks have been completed, the partners should switch roles.
Compiling group data •
On a blank sheet of paper, record the percent change in successful catches and basketball dribble times for the three conditions; do not include your name. One person should gather the papers and compile a list of individual scores for the class and then distribute a copy of the list to each class member.
•
Using Worksheet 8.1B, enter data from the list and calculate the class mean of the percent changes for the three conditions. 2
Lab 8.1
Human Motor Development
WORKSHEET 8.1 A
Effect of Conditions 1, 2, and 3 on Motor Skills Performance— Individual Results
Name: _________________________________________
Date: ____________________
Tennis Ball Catch
Total caught:
Condition 2: Cloudy Vision
Condition 1: Loss of Peripheral Vision
Normal
Total caught:
/10
Percent:
/10
Total caught:
Percent:
Percent:
Percent change:
Percent change:
/10
Basketball Dribbling Condition 3: Loss of Cutaneous Receptors
Normal Time:
Time:
Percent change:
3
Lab 8.1
Human Motor Development
WORKSHEET 8.1 B
Effect of Conditions 1, 2, and 3 on Motor Skills Performance— Group Results
Name: _________________________________________ Participant
Condition 1 Percent Change
Date: ____________________ Condition 2 Percent Change
Condition 3 Percent Change
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Mean:
0
0
0 4
Lab 8.1
Human Motor Development
Discussion 1. Describe how the reduction or removal of sensory receptor input influenced your performance in eac of the three laboratory task conditions.
2. Based on the group data sheet, which of the three conditions had the greatest effect on your class’s motor skill performance?
3. Describe modifications that could be employed as an aid to help individuals with these sensory defici perform more successfully.
5
