Preference Assessments: Why They are Important & How to …

10/23/2014

Preference Assessments:

Why They are Important & How

to do Them

Ruth M. DeBar, Ph.D., BCBA-D

Objectives

? Identify reasons it is important to assess

preference

? To distinguish between different types of

preference assessments and different procedures

for implementing each

? To identify variables to consider

? Extensions of preference

Challenges Assessing Preference for

Learners with ASD

? Communication deficits

? May have restricted interests

? May be exposed environment which limits

familiarity with novel items

©\Piazza, Fisher, Bowman & Blakey-Smith (1999)

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Why is Preference of Reinforcers

Important for Learners with ASD?

? The effectiveness of skill acquisition and

behavior reduction programs depend the

identification and the implementation of

potent reinforcers!

Preference Assessments

? Indirect

¨C Surveys & Interviews

? Direct

¨C Preference Directly measured

¨C Examples:

? Single-stimulus, paired-preference, MSWO,

duration-based

Why not simply ask?

?

?

?

?

Identifying commonly accessed items

Overlook idiosyncratic preferences

Incorrect selection

Characteristics that impede accuracy of

respondents reporting

Canella-Malone, Sabielny, Jimenez, & Miller (2013)

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Preference Assessments: Indirect

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Fisher, Piazza, Bowman, & Amari (1996)

Indirect Preference Assessments

? Examples: Interviews & surveys

¨C Pros

? Easyy & quick

q

¨C Cons

? Not as accurate as empirical preference

assessments

Direct Assessments in Identifying

Stimulus Preference

? Single-stimulus

? Paired Stimulus

? Multiple Stimulus Without

Replacement (MSWO)

? Duration-based preference

assessment

? Free-operant

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Single-stimulus Assessment

? In general,

¨C Identify items to be assessed

¨C Present one item at a time

¨C Allow

Allo learner 5 seconds to approach item

¨C If no approach for the 1st presentation, record N0

Approach on data sheet, represent, and prompt

engagement for 5 seconds

¨C If learner approaches item after representing it,

permit engagement

Single-stimulus Assessment

? In general,

¨C If no approach for the 2nd presentation, record

No Approach on data sheet and move onto

next trial

¨C If learner emits any refusal behavior or problem

upon presentation of stimulus, remove item and

discontinue its use

Single-stimulus Presentation

Item

Response

Fritos

C

Chip

C

Cookie

C

Ritz

C

Water

C

Notes

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