acti - afte
- acting out
- action
- action mechanism
- action pattern
- action potential
- action research
- action spectrum
- action system
- action time
- action unit
- action-specific energy
- activation
- activation center
- activation theory (of emotion)
- activation theory (of emotion)
- active
- active analysis
- active conditioned reflex
- active imagination
- active intellect
- active introversion
- active language
- active movements
- active role
- active technique
- active therapy
- active treatment
- active vocabulary
- activity
- activity / action quotient
- activity concept
- activity drive
- activity group therapy
- activity level
- activity need
- activity rhythm
- activity sampling
- activity school
- activity system
- activity therapy
