High Quality Content by WIKIPEDIA articles! Malleability of intelligence describes the processes by which human intelligence may be augmented through changes in neuroplasticity. These changes may come as a result of genetics, pharmacological factors, psychological factors, behavior, or environmental conditions. In general, the majority of plasticity as it relates to intelligence occurs at either the onset of development, during the critical period, or during old age. Malleable intelligence may refer to changes in cognitive skills, memory, reasoning, or muscle memory related motor skills.