Lab Report
Lab Report
In this paper, we want to examine the difference between the average response time for the dot probe task in threat and neutral conditions. In this study, we hypothesized that there is a significant difference between average response time for threat and neutral words. In order to check this difference we will use two-sample Student’s t-test for mean values.
Alternative hypothesis: There is a significant difference in mean response time between neutral words and threat words.
For the experimental conditions data, we find mean response time for both threat and neutral words and standard deviation for the response time for the threat and neutral words. The results are given below:
Set the level of significance alpha at 0.05
Since the same individuals were examined for both neutral and threat words, we can conclude that the samples are not independent. In order to check the difference in response time, paired Student’s t-test has been used. For paired t-test, the formula is given below:
t=dnd2-d2n-1
Where d is the difference between the response time for threat words and for neutral words. This difference is calculated in Excel. The results of the calculations are given below:
t=-0.359
the degrees of freedom are:
df=n-1=79
t-ctirical is
t79, 0.05=1.99
Since the absolute value of t-observed is less than t-critical, we failed to reject the null hypothesis. There is no enough evidence to support the claim that there is a significant difference in mean response time between neutral words and threat words. At 5% level of significance, the mean values of response time for these two groups are approximately equal.
