Practice variability
Variety of movement and context characteristics the learner experiences while practicing a skill
What 3 movement and context characteristics can be varied in practice:
What is the physical context
Environment where skill is performed
Ex) soft or hard ice
Example of situation where skill occurs
Fatigue state
Emotional state
What is variability benefits related to
Increased amount of performance error during practice
More variability more error more learning
How to implement practice variability
Must assess characteristics of physical context and skill characteristics of performance
- can’t be closed environment for too long if tested on open skill
What’s intertrial variability
Something changes each time you do skill
How to add practice variability if closed skill with no intertrial variability
How to add practice variability if closed skill with intertrial variability
What to vary is open skill
Regulatory and non regulatory condition
- environment and skill itself
Contextual interference
Disruption of memory and performance that results from performing variations of a skill within the context of practice
Ex) throwing different ways - underhand, overhand, windmill
What has the least amount of contextual interference to the most
Blocked, serial, random
Blocked
Keep practicing the same version of the skill over and over consecutively (no interference)
Serial
Different versions of the skill but the same order
Random
Different versions of the skill, never same order
Contextual interference effect
Learning benefit resulting from performing multiple skills in a high contextual interference practice schedule (random), rather than perform the skills in a low CI schedule (blocked)
Is contextual interference appropriate for all stages of learning
Beginners need blocked to become familiar
Must be able to recognize their errors
2 hypotheses for why contextual interference effect occurs
Elaboration hypothesis
elaboration of memory representation of the skill variations that a learner is practicing
Action plan reconstruction hypothesis
High amounts of CI benefit learning because the interference requires a person to reconstruct an action plan one’s subsequent practice trials for each skill variation
- must stay focused
Why does contextual interference effect occur?
Specificity of practice hypothesis
Test performance is directly related to the similarity between characteristics of the practice and test conditions
What are the 3 test characteristics related to practice specificity hypothesis
What are sensory/perceptual characteristics
Motor skill learning is specific to sources of sensory info available during practice
Ex) use of vision - if used during performance should be available for practice
Ex) if using right hand must watch someone using same hand