TY - GEN AU - Hjelmquist,E TI - Differentiation and unification in perception and cognition SN - 0036-5564 PY - 1991///0228 KW - Child KW - Cognition KW - Humans KW - Mental Recall KW - Perception KW - Reality Testing KW - Speech Perception KW - Visual Perception N1 - Publication Type: Comment; Journal Article UR - https://doi.org/10.1111/j.1467-9450.1990.tb00843.x ER -