1 / 14

Reaction Times: Hand Dominance and Participation in Sports

Reaction Times: Hand Dominance and Participation in Sports. Michelle Ji , Samantha Shober , April Zhang Block 4 16 May 2011. Introduction. Tested on 47 students and two teachers Whether or not hand dominance or sports had affect on reaction times Test Structure

nassor
Télécharger la présentation

Reaction Times: Hand Dominance and Participation in Sports

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reaction Times: Hand Dominance and Participation in Sports Michelle Ji, Samantha Shober, April Zhang Block 4 16 May 2011

  2. Introduction • Tested on 47 students and two teachers • Whether or not hand dominance or sports had affect on reaction times • Test Structure • Participants place fingers on both sides of meter stick (with dominant hand) at 40 cm mark • Meter stick randomly dropped • Participants grasp as soon as possible • Measurement made based on where index finger touched • Categorical Data • Whether or not participants played sports during the school year • Whether or not participants were left/right hand dominant

  3. Distribution of Data • Shape: Unimodal and slightly skewed right • Center: • Mean (disregarding right skew): 15.3765 • Median (to account for right skew): 14 • Spread: • Range: 36 • Q1: 12 • Q3: 20

  4. Normal Probability Plot: Does it Fit? • Majority of the points fit the normal model • With the exception of several points that only slightly fit the model • Roughly linear

  5. Graphical Display • Females • Shape: right skewed with one outlier • Center: • Median: 16 • Spread: • Range (with outlier): 31 • Range (without outlier): 26 • Q1: 13 • Q3: 22 • Males • Shape: left skewed with no outliers • Center: • Median: 14 • Spread: • Range: 23 • Q1: 6 • Q3: 17

  6. Graphical Display • Sports (Yes) • Shape: approximately normal with three outliers • Center: • Median: 14 • Spread: • Range: 32 • Q1: 10 • Q3: 20 • Sports (No) • Shape: slightly right skewed • Center: • Median: 16 • Spread: • Range (with outliers): 35 • Range (without outliers): 16 • Q1: 13 • Q3: 18

  7. Graphical Display • A+M (recorder + dropper) • Shape: • (without outlier) approximately normal • (with outlier) Right Skewed • Center: • Median: 13.5 • Spread: • Range (with outlier): 35 • Range (with outlier): 21 • Q1: 7.5 • Q3: 16 • A+S • Shape: Right Skewed • Center: • Median: 16.5 • Spread: • Range: 23 • Q1: 14 • Q3: 22.5 • S+M • Shape: Left Skewed • Center: • Median: 17 • Spread: • Range : 23 • Q1: 12 • Q3: 18

  8. Marginal Tables • Out of the people that we experimented on, more played sports • Out of the people that we experimented on, there were more females

  9. Conditional Tables • 12 males play sports • 11 males do not play sports • The proportion of males who play sports is approximately equal to the proportion of males who do not play sports • 18 females play sports • 8 females do not play sports • The proportion of females who play sports is approximately double the proportion of females who do not play sports

  10. Two-Way Tables • 57.89% of people who do not play sports are male • 42.11% of people who do not play sports are female • 40% of people who do play sports are male • 60% of people who do play sports are female • 30.77% of females do not play sports • 69.23% of females play sports • 47.83% of males do not play sports • 52.17% of males do play sports

  11. Independence • Sports vs. Gender are dependent variables • Conditional graphs are different

  12. Independence State: SRS Categorical Data All expected counts >/= 5 Check: Assumed representative Gender and sport involvement are categorical variables All cell counts >/= 5 We fail to reject Ho because the p-value of 0.22 is > α = 0.05. We have sufficient evidence that gender and sport involvement are not independent.

  13. Bias/Sampling Errors/Lurking Variables • Phrasing of questions • Ex: Do you play sports? Vs. Do you play sports at South? • Two different people dropping the ruler • Ambidextrous people • Their hand position before catching • Injuries/health complications • Positioning of hand before they caught the ruler • Some people used more fingers • Some people spread their fingers apart • Misunderstanding of test procedure • Misunderstanding of questions being asked • Ex: Perception of ‘sport’ Sampling Errors/Lurking Variables Participant Bias

  14. Conclusion • Females (generally) have slower reaction times compared to males • People who play sports usually have faster reaction times • When April and Michelle conducted the research, there were high levels of variability • Sufficient evidence that gender and sports are dependent • Future Plans • More tests (greater population) • Non-statistics students • Test of age to see if it has an affect on reaction rates

More Related