Zumbach, J., & Mohraz, M. (2008). Cognitive load in hypermedia reading comprehension: Influence of text type and linearity. Computers in human behavior, 24(3), 875-887.

Cognitive load in hypermedia reading comprehension: Influence of text type and linearity

Extraneous cognitive load in hypermedia learning is determined by the interaction of presentation format (linear/non-linear text) with text type (narrative text or encyclopedia text). Results suggests that non-linear information presentation of narrative text structure increases cognitive load and decreases knowledge acquisition; no significant difference found for different presentation formats of encyclopedia text. 

Cognitive Load in Hypermedia

1. Salience of the map structure is significantly associated with disorientation, but not extraneous cognitive load. 
2. The number of nodes did not have a great effect on cognitive load. 

How the design and complexity of concept maps influence cognitive learning processes

Johns Hopkins University

The working memory load that some biologically secondary information imposes. Cognitive load is determined by element interactivity. 

Cognitive Load

Processing a large number of elements of information in the working memory simultaneously generates high element interactivity, which translates into higher cognitive load. 

Cognitive Load and Element Interactivity

There are three types of cognitive load: intrinsic cognitive load, extraneous cognitive load, and germane cognitive load. 

Types of Cognitive Load

Novakian concept maps lowers the intrinsic cognitive load because it presents the knowledge in a more readily acceptable manner which lessons the requirement for the brain to form schemas in understanding the relation of elements of information provided in passages; however, it creates a greater extraneous cognitive load (i.e., the overhead of extraneous cognitive load increases at a higher rate than the decrease of intrinsic cognitive load when the concept map gets larger). Consider the listed effects.

Cognitive Load of Novakian Concept Maps and Hybrid Maps

Studies of Cognitive Load in Non-linear Text

1. Effort rating 
2. NASA TLX
3. Scale by Eysink et al. (2009)
4. Scales by Leppink et al. (2013)
5. Dual-task methodology

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