Derivational suffix productivity for students with and without language-learning disabilities

Area of Science:

• Psycholinguistics
• Developmental Psychology
• Linguistics

Background:

• Derivational suffixes are crucial for word formation and meaning.
• Understanding how children acquire and use these suffixes is key to language development.
• Language-learning disabilities (LLD) can impact suffix acquisition and use.

Purpose of the Study:

• To investigate the impact of derivational suffix productivity on usage by students.
• To compare suffix use in students with and without language-learning disabilities (LLD).
• To examine how suffix productivity influences accuracy in conveying meaning.

Main Methods:

• A study involving 69 elementary to middle school students.
• Utilized an elicitation task for producing derived forms.
• Employed a forced-choice task for selecting derived forms to label novel items.
• Investigated the use of high-frequency suffixes (e.g., -er, -let) versus low-frequency ones (e.g., -ant, -kin).

Main Results:

• Students consistently favored highly productive suffixes to convey specific meanings (e.g., agentive, diminutive).
• Suffix productivity correlated with accuracy in conveying meaning; more productive suffixes were used more accurately.
• Students with LLD showed similar patterns of suffix use but were less accurate than age-matched peers.
• LLD students' performance was comparable to younger, typically developing peers with similar language skills.

Conclusions:

• Derivational suffix productivity significantly influences children's word formation strategies.
• While students with LLD follow similar productivity patterns, they exhibit challenges in accurate suffix meaning interpretation.
• Language skills, rather than chronological age alone, are a critical factor in understanding derivational suffix acquisition.