The Effects of Message Encoding Techniques on Recall by Literate Adults Using AAC Systems

Janice Catherine Light, Peter Lindsay, Linda Siegel, Penny Parnes

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The study investigated the information processing demands of three different approaches to message encoding: letter codes based on the first letters of salient words in the message; letter category codes based on the first letters of a category plus a specifier; and iconic codes derived from-the icons and semantic associations proposed by Baker (1982, 1987). Six nonspeaking, functionally literate, physically disabled adults participated in the study. Three counterbalanced conditions, corresponding to the three message encoding techniques, were presented to each subject. Within each condition, subjects were given 15 minutes of study time to learn a list of 30 messages and their two element codes. Half of the messages involved concrete referents; the other half involved abstract concepts. After a 40 minute retention interval spent in conversation with the investigator, the subjects were randomly presented with contexts that necessitated the messages- use and were tested for their recall of the codes. The results indicated that the subjects were significantly more accurate recalling the salient letter codes than the codes within the other two message encoding techniques. The recall of the codes was significantly better for concrete messages than for abstract ones. The findings suggested that the potential to accelerate communication rate through preprogramming messages depends critically on the cognitive demands of the specific encoding technique used.

Original languageEnglish (US)
Pages (from-to)184-201
Number of pages18
JournalAugmentative and Alternative Communication
Volume6
Issue number3
DOIs
StatePublished - Jan 1 1990

Fingerprint

Disabled Persons
Automatic Data Processing
Semantics
Communication
Research Personnel
cyhalothrin

All Science Journal Classification (ASJC) codes

  • Rehabilitation
  • Speech and Hearing

Cite this

@article{c6e84a4995394678a3a9973f33ce6935,
title = "The Effects of Message Encoding Techniques on Recall by Literate Adults Using AAC Systems",
abstract = "The study investigated the information processing demands of three different approaches to message encoding: letter codes based on the first letters of salient words in the message; letter category codes based on the first letters of a category plus a specifier; and iconic codes derived from-the icons and semantic associations proposed by Baker (1982, 1987). Six nonspeaking, functionally literate, physically disabled adults participated in the study. Three counterbalanced conditions, corresponding to the three message encoding techniques, were presented to each subject. Within each condition, subjects were given 15 minutes of study time to learn a list of 30 messages and their two element codes. Half of the messages involved concrete referents; the other half involved abstract concepts. After a 40 minute retention interval spent in conversation with the investigator, the subjects were randomly presented with contexts that necessitated the messages- use and were tested for their recall of the codes. The results indicated that the subjects were significantly more accurate recalling the salient letter codes than the codes within the other two message encoding techniques. The recall of the codes was significantly better for concrete messages than for abstract ones. The findings suggested that the potential to accelerate communication rate through preprogramming messages depends critically on the cognitive demands of the specific encoding technique used.",
author = "Light, {Janice Catherine} and Peter Lindsay and Linda Siegel and Penny Parnes",
year = "1990",
month = "1",
day = "1",
doi = "10.1080/07434619012331275454",
language = "English (US)",
volume = "6",
pages = "184--201",
journal = "AAC: Augmentative and Alternative Communication",
issn = "0743-4618",
publisher = "Informa Healthcare",
number = "3",

}

The Effects of Message Encoding Techniques on Recall by Literate Adults Using AAC Systems. / Light, Janice Catherine; Lindsay, Peter; Siegel, Linda; Parnes, Penny.

In: Augmentative and Alternative Communication, Vol. 6, No. 3, 01.01.1990, p. 184-201.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The Effects of Message Encoding Techniques on Recall by Literate Adults Using AAC Systems

AU - Light, Janice Catherine

AU - Lindsay, Peter

AU - Siegel, Linda

AU - Parnes, Penny

PY - 1990/1/1

Y1 - 1990/1/1

N2 - The study investigated the information processing demands of three different approaches to message encoding: letter codes based on the first letters of salient words in the message; letter category codes based on the first letters of a category plus a specifier; and iconic codes derived from-the icons and semantic associations proposed by Baker (1982, 1987). Six nonspeaking, functionally literate, physically disabled adults participated in the study. Three counterbalanced conditions, corresponding to the three message encoding techniques, were presented to each subject. Within each condition, subjects were given 15 minutes of study time to learn a list of 30 messages and their two element codes. Half of the messages involved concrete referents; the other half involved abstract concepts. After a 40 minute retention interval spent in conversation with the investigator, the subjects were randomly presented with contexts that necessitated the messages- use and were tested for their recall of the codes. The results indicated that the subjects were significantly more accurate recalling the salient letter codes than the codes within the other two message encoding techniques. The recall of the codes was significantly better for concrete messages than for abstract ones. The findings suggested that the potential to accelerate communication rate through preprogramming messages depends critically on the cognitive demands of the specific encoding technique used.

AB - The study investigated the information processing demands of three different approaches to message encoding: letter codes based on the first letters of salient words in the message; letter category codes based on the first letters of a category plus a specifier; and iconic codes derived from-the icons and semantic associations proposed by Baker (1982, 1987). Six nonspeaking, functionally literate, physically disabled adults participated in the study. Three counterbalanced conditions, corresponding to the three message encoding techniques, were presented to each subject. Within each condition, subjects were given 15 minutes of study time to learn a list of 30 messages and their two element codes. Half of the messages involved concrete referents; the other half involved abstract concepts. After a 40 minute retention interval spent in conversation with the investigator, the subjects were randomly presented with contexts that necessitated the messages- use and were tested for their recall of the codes. The results indicated that the subjects were significantly more accurate recalling the salient letter codes than the codes within the other two message encoding techniques. The recall of the codes was significantly better for concrete messages than for abstract ones. The findings suggested that the potential to accelerate communication rate through preprogramming messages depends critically on the cognitive demands of the specific encoding technique used.

UR - http://www.scopus.com/inward/record.url?scp=84961465776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961465776&partnerID=8YFLogxK

U2 - 10.1080/07434619012331275454

DO - 10.1080/07434619012331275454

M3 - Article

AN - SCOPUS:84961465776

VL - 6

SP - 184

EP - 201

JO - AAC: Augmentative and Alternative Communication

JF - AAC: Augmentative and Alternative Communication

SN - 0743-4618

IS - 3

ER -