1. Examine the operational definition(s) used to define and measure preference f
ID: 3323684 • Letter: 1
Question
1. Examine the operational definition(s) used to define and measure preference for violent TV. Did it change for TV13? 2. How did the authors deal with the possible explanation that Agg3 might have caused TVV3 and Agg13 to be related? 3. Nothing with TV13 - can you discern any possible explanation? Is there any indication that high school graduates just cut down their TV viewing so much that correlations are low because of limited range?Correlations and causality - Directionality Given correlation between A and B . A could cause B, or B could cause A . Research example 22 Cross-lagged panel correlation . If B (aggressiveness) happens ten years after A (preference for violent TV), A could cause B, but B cannot cause A Preference for violent TV in the 13th grade (TVWL 13) .05 the third grade .01 .21 -,05 .31 the third grade- .38 the 13th grade AGG13) Notes "p Comments
Explanation / Answer
In this question, there are two attributes with two levels
Aggression
Violent TV
and try to see whether there is any correlation between them
For that he considered two level of aggression first at grade 3 and second at grade 13
and two level of voilent tv first at 3rd grade and second at 13 grade
In the first image, one can easily see the correlation between these four level.
In the second image, there is an introduction to a new concept that is partial correlation coefficient. Now to see the correlation between two variable we keep the effect of third variable as constant value or a fixed value.
Table No 9.1 shows the values of partial correlations between aggresiveness at 13 grade and TV violent at 3rd grade by taking into account of other factors like child IQ, mother aggressiveness etc.
Hence one can see the effect of these variables on the aggressiveness at 13 grade anf tv violent at 3rd grade.
(a) From the first table the correlation between the aggression at 3rd grade and violent tv at 13 grade with very low correlation. So it may be possible that while finding partial correlation it may be more less. As the effect of third variable will decrease the correlation between two variables.
(b) Author just present the correlation coefficient between aggressiveness at 13 and tv at 3rd grade and it is very low or close to zero so one can comment that relationship between aggressiveness at 13 and tv 3 is very low.
but aggression at grade 3 is correlated with agression at grade 13.
(c) In think this is not the reason as author studied the impact of aggression and violent tv there is no question of low correlation due to limited range. The correlation just show the linear relationship between variables and with passage of time if it persists than it means that the two variables are correlated with each other otherwise it should be low. It may happent that the correlation may decreases or increase between two variables with passage of time.
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