Individual differences in orthographic priming relate to phonological decoding skill in adults

Area of Science:

• Cognitive Psychology
• Psycholinguistics
• Neuroscience

Background:

• Orthographic priming, the influence of prior visual word exposure on subsequent processing, is a key area in understanding word recognition.
• Individual differences in reading skills, including phonological decoding and orthographic processing, are known to impact cognitive tasks.
• Previous research has established links between reading ability and various aspects of language processing, but the role of individual differences in orthographic priming requires further investigation.

Purpose of the Study:

• To investigate the relationship between individual differences in orthographic priming and measures of orthographic processing, reading history, current reading ability, and verbal intelligence in university students.
• To determine how variations in phonological decoding skill and nonword reading ability influence the utilization of orthographic information during word and nonword recognition.
• To explore the impact of prime pronounceability and target lexical status on orthographic priming effects across different reading proficiency levels.

Main Methods:

• Participants (university students) were presented with pronounceable and unpronounceable nonword primes preceding word and nonword targets.
• Orthographic priming effects were measured by comparing reaction times and accuracy for related versus unrelated prime-target pairs.
• Participants also completed a battery of tests assessing orthographic processing, reading history, current reading ability (including nonword reading and phonemic decoding efficiency), and verbal intelligence.

Main Results:

• Individual differences in nonword reading skill and other reading/spelling abilities were significantly associated with the degree of orthographic priming observed.
• Participants with lower phonological decoding skills showed greater benefits from orthographic relatedness, particularly with unpronounceable primes for word targets and pronounceable primes for nonword targets.
• Extreme group analyses indicated that individuals with the lowest phonemic decoding efficiency benefited generally from orthographic relatedness, whereas those with the highest efficiency showed benefits only under specific conditions.

Conclusions:

• University students exhibit significant variability in their orthographic processing skills and the extent to which they rely on orthographic information during word recognition.
• Individuals with less proficient nonword reading skills may possess less precise orthographic representations, leading to a greater reliance on coarse-grained orthographic information.
• The findings suggest that the interplay between individual reading abilities and stimulus properties (prime pronounceability, target status) modulates the use of orthographic information in visual word recognition.