Merriënboer, J.J.G. van

training problem re flection effect example performance condition participant flection format van gerven training format transfer group psychology sweller age group interaction information instruction explanation model learners memory modality gerven multimedia score training time van merrienboer theory load theory journal merrienboer study effort ficiency modality effect level analysis skill research difference age groups capacity result design processing multimedia condition probability efficiency material transfer tasks training ef ficiency process target jug contrast learner domain mayer netherland p.w.m re flect training efficiency schemata adult animation 87–105 ficient number hypothesis mobile fi rst probability calculation far-transfer order strategy salthouse method experiment