ABSTRACT
Three other relations are found invariant in three out of four cohorts, namely, those between music and radio listening (.14, .14, .12), between radio and TV (.16, .26, .17) and between TV and reading comics (.19, .25, .30). Quantitatively, these structural relations thus seem to be fairly stable. It may be noted, though, that the relation between TV and reading comics grows stronger over time. The first two of these relations withstand the control of influences from the background variables both qualitatively and quantitatively. However, the relationship between TV viewing and reading comics is partially due to the influence of the background variables. When this influence is controlled for by means of partial correlations, the relationship disappears in the first cohort and diminishes in magnitude in the two others, from .25 and .30 down to .19 and .22, respectively.
