Four short paired-associate'tasks were administered to 144 subjects a t each of grades 3 and 6 and u2 subjects a t grade 9.tasks, e n t i t l e d Pictures, Concrete Words, Abstract Words, and JapaneseThe four Characters, contained response elements of the types indicated i n t h e i r t i t l e s . Planned camparisons i n mew l e v e l of performance involved t h e f i r s t three tasks. .Performance on Pictures was found to be superior -to Concrete Words, and Concrete Words was superior t o Abstract Words, w i t h the former e f f e c t reaching significance for grades 3 and 9 and t h e l a t t e r for grades 3 and 6. a l l four tasks, the correlation between Pictures and Concrete Words w a s found t o increase across grade levels t o a greater degree than the correlation between any other p a i r of tasks. This last result w a s paralleled i n data from an auxiliary experiment and w a s interpreted t o suggest a developmental increase i n children's use of verbal processes along w i t h imagery t o l e a r n p i c t o r i a l l y presented materials. This v a r i a t i o n has been effected i n two major ways, both generally i n connection w i t h a paired-associate learning format. of investigations, t h e learning of problems employing concrete nouns has been compared with performance on t a s k s using p i c t o r i a l represent a t i o n s of those nouns. Another s e t of studies has contrasted the l e a r n i n g of a b s t r a c t and concrete verbal materials-that is, words which d i f f e r i n t h e extent t o which they can be represented p i c t o r i a l l y .I n general, t h i s research has shown t h a t children l e a r n associations more e a s i l y when p i c t u r e s r a t h e r than words a r e used (e.g., Rohwer, 1968;Rohwer, Lynch, Levin t i Suzuki, 1967) and, i n the case of' verbal materials, when the words a r e concrete r a t h e r than a b s t r a c t (e.g., Paivio & Yuille, I n one s e r i e s 1966).Although it i s generally agreed t h a t v i s u a l imagery plays a t l e a s t some r o l e i n producing these e f f e c t s , the nature of t h i s r o l e remains l a r g e l y undetermined on the basiis of the simple Lntertask comparisons which have been performed. The f a c t t h a t p i c t u r e s a r e e a s i e r t o l e a r n than words, f o r example, can be i n t e r p r e t e d i n e i t h e r of two ways. It is possible t h a t p i c t o r i a l and verbal associations are learned by e s s e n t i a l l y d i f f e r e n t means, perhaps through imagery on the one hand and verbal memory on the other, and t h a t the f'orner is t h a t high correlations observed across d i f f e r e n t tasks indicate a s h i l a r i t y i n the processes used t o l e a r n them, while lower correlations suggest the operation of r e l a t i v e l y dissimilar processes.
A basic assumption of t h i s approach, as hasThe current study w a s designed t o provide evidence bearing on the
functional s i m i l a r i t y f o r children of various verbal and p i c t o r i a ltasks, throug...