Question

A researcher records the amount of time (in minutes) that parent-child pairs spent on social networking sites to test whether they show any generational differences. From the following findings reported in APA format, interpret these results.

Parents spent significantly less time on social networking sites compared to their children

(M_D = 42 minutes),

t(19) = 3.156,

p < 0.05,

d = 0.66.

State the research design used (repeated measures or matched pairs).

repeated measures design matched pairs design    

State the sample size, how many
participants?

State the decision to retain or reject the null hypothesis.

Retain the null hypothesis. Reject the null hypothesis.    

State the effect size:

small /medium/ large

Answer 1

1)

matched pairs design    (since in both groups both the parents and child are different)

2) sample size : 2*(19+1) =40 (20 in each group of parent and child)

3)

since p value is less than 0.05 , Reject the null hypothesis.    

4)

medium (since d is between 0.5 and 0.8)