Download - 110104 Task switching review slides
task switchingR e v i e w
abstract
‘Switch cost’ is reduced by preparation
Carry-over
Reconfiguration
utilisation behaviour
Grabbing objects in view and starting the ‘appropriate’ behaviour at an 'inappropriate' time.
early research
Prepared Reflex: automaticity and control in S-R translation
Ach: Overlearnt responses competing with the acquisition of novel S-R mapping.
Jersild - Task-switching: repeating/ alternating
task switching paradigms
Jersild’s method
Alternating-runs paradigm - task alternates every N trials, where N is constant and predictable
Prespecified task sequence (e.g. colour-shape -colour )
Task-cueing paradigm, task is unpredictable, task cue appears either with or before S
Intermittent-instruction paradigm, interrupted by an instruction
basic phinomena
Switch cost(task-repetition benefit)
Preparation effect
Residual cost
Mixing cost
Predictable and unpredictabletask switching
odd/even, high/low
cued by colour/ by shape
preparation effect
residual cost
To classify digit(odd/even) or letter(consonant/vowel)
preparation effectresidual cost
sources of the switch cost
Time taken by control operations - TSR
Transient task-set inertia
Associative retrieval
All of the above?
brain correlates of task switching
Medial and lateral regions of the prefrontal cortex
Parietal lobes
Cerebellum
Subcortical regions
issues for further research
Problems with preparation effect
The role of language
Puzzling observations