Alastair D' Smith

1
Common mechanisms in perception and action

• Alastair D. Smith
• Iain D. Gilchrist
• Bruce Hood

2
Cognitive and motor systems
Stillings et al (1995)
3
Cognitive and motor systems
Cognitive
Motor
Stillings et al (1995)
4
Evidence from graphic production

• Models of drawing assume the same separation.
  However, converging evidence from normal subjects
  and neurological patients argues for greater
  integration. For example...
• Neurological damage can impair spatial
  processing for drawing only

5
Is visual search really like foraging?

• Visual search for a target ( ) within an
  array is assumed to be an analogue of foraging in
  humans (e.g. lost keys). However...

Gilchrist et al (2001) designed a foraging
paradigm and found a key difference - rechecking
of locations did occur but was rare. Suggests an
increased role for memory. What kind of memory?
Is it related to the cost of rechecking?