Wickens' Context Alpha and Context Beta distinction¶

Theory · All theories
Evidence · 2 claims (2 for) · 1 study (1 review), q2 · 0 of 1 report an effect size · 2 claims rest on one study

Description¶

The chapter reviews Wickens' (1987) taxonomy distinguishing two types of context. Context Alpha refers to environmental surroundings that do not meaningfully relate to the event, such as the classroom in which students learn; Context Beta is "the situation in which one stimulus event combines with another stimulus event to define the correct response or meaning of the event." The chapter uses this distinction to probe what counts as a context for contextual diversity, but notes it confounds the unit of context with the content of context, and that distributional models treat incidental context as becoming meaningful context through accumulated cooccurrences.

Design Implications¶

Context¶

Requirements¶

• A theorist-specified definition of the contextual unit and its content for word-learning models

Constraints¶

• The chapter states Wickens' principle confounds the unit of context and the content of context, and is unclear about how far range of time or space extends before a context changes

Target Learners¶

• students in classrooms
• learners generally

Target Learning Objectives¶

• contextual encoding
• word learning

Claims¶

• Contextual diversity facilitates episodic recall but impairs recognition [+W]
• Words higher in contextual diversity and semantic richness are processed more accurately and efficiently in lexical tasks [+W]

Related Theories¶

• Expectancy-congruency learning mechanism updating lexical representations from context fit
• Principle of likely need versus principle of repetition as competing accounts of lexical learning
• Semantic diversity as a graded measure of contextual diversity based on document content overlap

Examples¶

• Teach vocabulary by varying contexts rather than repeating words within the same context

Key Sources¶

• Jones, M. N., Dye, M., & Johns, B. T. (2017). Context as an Organizing Principle of the Lexicon. Psychology of Learning and Motivation, Volume 67. https://doi.org/10.1016/bs.plm.2017.03.008