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The Effect of Age on Reaction Time
Rose Seabrook
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Problem: How does the age of a person affect their reaction time?
Hypothesis: If a person is in the age range years old, then they will have the fastest reaction time.
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Basic Concepts Reaction Time Visual Cortex Motor Cortex
Interval of time between application of a stimulus and detection of response Visual Cortex Visually processes information and patterns Motor Cortex Plans, controls, executes voluntary functions Reticular Formation Filters incoming stimuli Governs the functions of major organisms
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Purpose of Experiment To discover why people in the age group are better in sports, but, are more likely to get into car accidents.
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Design Diagram Level 10-25 26-35 36-45 46-55 56-70 Trials 20
Title: The effect of the age of a person on their reaction time Hypothesis: If a person is in the range years old then, they will have the fastest reaction time. IV: age Level 10-25 26-35 36-45 46-55 56-70 Trials 20
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Design Diagram Cont. DV: Distance Ruler Falls (cm)
Constants: height ruler is dropped from, height at which the person catches the ruler, and the weight of the ruler.
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Results 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10-25 22 23 26-35 27 36-45 21 26 46-55 25 28 24 30 56-70 29
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Results Cont. Averages 10-25: 14.9 26-35: 16.6 36-45: 17.3 46-55: 19.3
26-35: 36-45: 46-55: 56-70:
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Statistical Analysis ANOVA Sum of Square Difference Degrees of Freedom Mean Squared Fisher F- Value Significance (p)=.05 Between Groups 1, 4 8.292 <0.001 Within Groups 2, 95 N/a Total 3, 99 data is of significance because the p value is <.05 1/1000 chance that data occurred by chance
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Graphed Data
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Conclusions Hypothesis Supported Reticular Formation
10-25 have a faster reaction time Reticular Formation Tasks become routine, brain receives less stimulation, lower levels of activity Slows down memory and reaction time as you age Visual and Motor Cortex Slow down with age
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Sources of Error Area Watched Attention Span Human Error
Ruler or hand Attention Span Readiness Human Error Measurement Alcohol Influence Inhibits reaction time
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Improvements Designate an area to watch
Warn subject when ruler will be dropped No alcohol in subjects system
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Extensions and Applications
Alcohol content on reaction time Gender on reaction time Driving Sports
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THE END
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