10.6084/m9.figshare.5398345.v1
Gavin Buckingham
Gavin
Buckingham
Darren Reid
Darren
Reid
Lauren M. Potter
Lauren M.
Potter
How Prior Expectations Influence Older Adults’ Perception and Action During Object Interaction. Supplementary Materials
Brill Online
2017
Ageing
grip force
load force
size–weight illusion
Cognitive Science not elsewhere classified
Sensory Processes, Perception and Performance
Vision Science
2017-09-12 12:01:48
Journal contribution
https://brill.figshare.com/articles/journal_contribution/How_Prior_Expectations_Influence_Older_Adults_Perception_and_Action_During_Object_Interaction_Supplementary_Materials/5398345
<p>The apparent size of an object can influence how we interact with and
perceive the weight of objects in our environment. Little is known, however,
about how this cue affects behaviour across the lifespan. Here, in the context
of the size–weight illusion, we examined how visual size cues influenced the predictive
application of fingertip forces and perceptions of heaviness in a group of
older participants. We found that our older sample experienced a robust
size–weight illusion, which did not differ from that experienced by younger
participants. Older and young participants also experienced a real weight difference
to a similar degree. By contrast, compared to younger participants our older
group showed no evidence that size cues influenced the way they initially
gripped and lifted the objects. These results highlight a unique dissociation
between how perception and action diverge across the lifespan, and suggest that
deficits in the ability to use prediction to guide actions might underpin some
of the manual interaction difficulties experienced by the older adults. </p>