A developmental psychologist wanted to know whether watching videos aimed at inc

Question

A developmental psychologist wanted to know whether watching videos aimed at increasing the cognitive abilities of toddlers (e.g., Baby Einstein) really helped.  He recruited 30 families from the local community with a child from 18 months to 24 months in the home.    Parents in the experimental group were instructed to have their toddler watch the video for 10 minutes per day for 4 weeks.   Parents in the control condition spent the same amount of time playing with their toddlers.   The psychologist was also interested in whether social economic status (SES) might be a factor in the effectiveness of the videos and so half of the families in each condition had household incomes of less than $30,000 per year and the other half of the families had incomes over $60,000 per year.   At the end of the 4-week test period, the developmental psychologist visited each home and administered a standardized knowledge test appropriate for that age level.   The results showed that the watching the videos did, in fact, result in higher scores on the knowledge test but only for the low socio economic status families.  No differences were found for the high SES families.

What type of research design was used? How many independent variables and how many levels of each independent variable were there? Did the results show an interaction?  Do we know if main effects were found? Can you think of some ways to improve the study?

Explanation / Answer

matched subject type of research design was used as 30 families were selected from the local communities and divided into 2 groups with different amount of independent variables. there were two independent variables one was the effect of the watching videos and the other was the sociol economic status. for each independent variable there were 4 levels. for watching videos there were 2 groups watching videos and 2 not watching it and out of the 2 watching it one was of high SES and the other of low SES and a similar case was there for the ones not watching also. hence there were 4 levels of each independent variable. ye sthe results showed the interaction as they clearly illustrated no change in high SES groups of watching the video but watching videos effecting the knowledge in low SES groups. in my view, watching videos as compared to playing games is an unfair relation hence this can be improved by watching videos and sitting ideal or watching videos of different types or else some other entertainment process which can be relational like listening to music

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