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DTLA-4™

Detroit Test of Learning Aptitude

Donald D. Hammill, Ed.D.

Measure both general intelligence & discrete ability areas in ages 6 to 17


DTLA-4™

Overview

Overview

The DTLA-5 is now available! Learn more. The Detroit Tests of Learning Aptitude (DTLA-4) is one of the oldest and most respected tests that evaluate specific mental abilities of individuals ages 6 to 17. The test includes interpretation in terms of current theories of intelligence. The DTLA-4 is the test of choice for professionals interested in a thorough investigation of an individual's specific cognitive functions. The DTLA-4 measures basic abilities, and shows the effects of language attention, and motor abilities on test performance.

Key Areas Measured


Key Areas Measured

  • Word Opposites
  • Sentence Imitation
  • Story Construction
  • Basic Information
  • Word Sequences
  • Design Sequences
  • Reversed Letters
  • Design Reproduction
  • Symbolic Relations
  • Story Sequences

Quick Reference

Age

Age

6 to 17

Administration Type

Administration Type

Professional

Administration Time

Administration Time

40 to 120 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Handscored
Software (Scoring)

Quick Reference

Age

Age

6 to 17

Administration Type

Administration Type

Professional

Administration Time

Administration Time

40 to 120 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Handscored
Software (Scoring)

How To Use

How To Use

Reliability and Validity

Reliability and Validity

Normative Data

Normative Data

The DTLA-4 is administered using a series of picture books, design sequence cubes and sequence chips. In total, the assessment includes 10 subtests and the results of the subtests can be combined to form 16 composites that measure both general intelligence and discrete ability areas. This comprehensive and thorough assessment takes anywhere from 40 minutes to 2 hours to administer.

The following subtests are included in the DTLA-4: Word Opposites, Design Sequences, Sentence Imitation, Reversed Letters, Story Construction, Design Reproduction, Basic Information, Symbolic Relations, Word Sequences, and Story Sequences. The subtests are easily assigned to composites that represent major popular theories such as Horn and Cattell's fluid and crystallized intelligence, Jensen's associative and cognitive levels, Das' simultaneous and successive processes, and Wechsler's verbal and performance scales.

The assessment is handscored using easy to follow response booklets. Reports and scoring can be generated using the convenient Windows comparative software scoring package.

Reliability

Reliability of the DTLA-4 was examined using estimates of contest sampling, time sampling, and scorer differences. Internal consistency reliability coefficients (content sampling) generally exceed .80 for the subtests and .90 for the composites. Time sampling was investigated using the test-retest technique. Test-retest coefficients range from .71 to .96 for the subtests; those for the composites all exceed .90. Scorer reliability coefficients were all in the .90s.

Validity

Evidence of the validity of DTLA-4 test scores is provided for content-description validity, criterion-prediction validity, and construct-identification validity. Content-description validity is demonstrated through careful documentation of subtest and item selection and analysis. A particularly powerful method for content-description validity is the use of conventional item analysis procedures, which allow the identification of good items and the deletion of bad items. Criterion-prediction validity is explored by comparing the results of DTLA-4 with those of other aptitude tests, such as the TONI-3, WISC, KABC, PPVT and W-JPEG. Construction-identification validity is demonstrated by showing the relationship between DTLA-4, chronological age and tests of academic achievement. Further, DTLA-4 subtests and composites intercorrelate and factor according to hypothesized constructs. Convincing evidence for validity is provided in the form of several confirmatory factor analyses.

The DTLA-4 was normed on 1,350 students from 37 states. The demographic characteristics of the normative sample are representative of the U.S. population as a whole (as reported in the Statistical Abstract of the United States, U.S. Bureau of the Census, 1996) with regard to ethnicity, race, gender, urban/rural residence, family income, educational attainment of parents, and geographic distribution. The norms of the DTLA-4 are stratified by age.

Pricing
Online

Online

Assess easily online from anywhere. Includes automatic scoring and report generation.

Software

Software

Requires software. Includes automatic scoring and report generation.

Handscored

Handscored

QuikScore forms are scored by hand without reports.

Starter Kits
Certification

Starter Kits

Simulations
Certification

Simulations

Kits

Forms

DTLA-4 Response Forms

DTLA-4 Response Forms

Software
CA: $46.00
(Sold in packs of 25)

DTLA-4 Profile/Summary Forms

DTLA-4 Profile/Summary Forms

Handscored
CA: $46.00
(Sold in packs of 25)

Ortiz PVAT Licenses

Ortiz PVAT Licenses

Online Scoring

Online Scoring

Supplementary Materials

Supplementary Materials

Other Materials

Other Materials

DTLA-4 Examiner Record Booklets

DTLA-4 Examiner Record Booklets

Default Title
CA:
$79.00