Visual Routes to Knowledge and Action

Visual Realisation - Object Recognition - Dr Mel Goodale

People are complicated when it comes to visualizing. Vision demands different actions for different visions. As such this impacts on the required interaction with any LO determined by the visual presentation of that LO. The outcome could lead to a poor learning experience. Our visions are categorized as visual systems for perception and visual systems for action.

The motor system needs to identify orientation for correct actions to occur. Perception may then impact on the correct action to align with orientation.

Double Dissociation can impact differently on different people. That is, in one person it can effect the perception or the action sectors of the brain but not both.

The Ventral Perception stream recognises objects in different sections of the ventral system.

There are 2 visual systems, the ventral stream and the dorsal stream, that have the task of rendering objects in different orientations again a critical factor for LO design.

Ventral Stream	Dorsal stream
Scene parsing	Visual control
Scene based frame reference	Effector based frames
Relational metric	Absolute metrics
Proportional	Isomorphic
	Moment to moment calculations

Computer rendering delays effect the real time use of the motor system so this is also a critical design issue for consideration.

There is a difference between the dorsal and ventral streams actions and perceptions in that the brain interprets the differences in differing ways having adverse effects on perception and action outcomes.

Online instruction can benefit from understanding the difference between perception and action.

A very interesting presentation but I felt it would take more than one session for designers to come to grips with the implications.