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(29) = 3.343,

p < 0.05,

d = 0.61.

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

repeated measures designmatched pairs design    

State the sample size.
participants

State the decision to retain or reject the null hypothesis.

Retain the null hypothesis.Reject the null hypothesis.    

State the effect size.

smallmedium    large

Answer 1

Solution:

The research design used is matched pairs design as it uses different participants who are matched in terms of important characteristics.

The sample size is 29.

Since the p-value is less than 0.05, thus based on the data it can be concluded that the decision to reject the null hypothesis should be taken.

Usually if d is close to 0.2 it is small size effect, if nearer to 0.5 then medium size effect, close to 0.8 would hint to a large size effect. In this case d=0.61, thus it points to a medium size effect.