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DTLA-5

Detroit Tests of Learning Abilities - Fifth Edition

Donald D. Hammill, Ronnie L. McGhee, David J. Ehrler

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


DTLA-5

Overview

Overview

The Detroit Tests of Learning Abilities–Fifth Edition (DTLA-5) is the oldest and most venerable of the tests of specific cognitive abilities. The test includes 12 subtests: Humanities/Social Studies, Science/Mathematics, Word Opposites, Word Associations, Geometric Matrices, Geometric Sequences, Sentence Imitation, Word Span, Design Reproduction, Reversed Letters, Trail Making, and Rapid Naming. The results of the subtests can be combined to form 9 composites. Six of these composites represent different cognitive subdomains (Acquired Knowledge, Verbal Comprehension, Nonverbal Problem Solving, Verbal Memory, Nonverbal Memory, and Processing Speed); two of these composites represent larger, important cognitive domains (Reasoning Ability and Processing Ability). One global composite is formed by combining the results of all 12 of the DTLA-5 subtests and represents general cognitive ability. Examiners can administer the subtests from one or both of the DTLA-5 domains, depending on the purpose of the evaluation.

Key Areas Measured


Key Areas Measured

  • Acquired Knowledge
  • Nonverbal Problem Solving
  • Nonverbal Memory
  • Processing Ability
  • Processing Speed Reasoning Ability
  • Verbal Comprehension
  • Verbal Memory
  • Design Reproduction
  • General Cognitive Ability

Quick Reference

Age

Age

6 to 17-11

Administration Type

Administration Type

Professional

Administration Time

Administration Time

40-120 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Paper record forms, online scoring

Quick Reference

Age

Age

6 to 17-11

Administration Type

Administration Type

Professional

Administration Time

Administration Time

40-120 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Paper record forms, online scoring

How To Use

How To Use

Reliability and Validity

Reliability and Validity

The DTLA-5 Online Scoring and Report System (provided as part of the DTLA-5 complete Kit) was designed as a quick, efficient tool for (a) entering test-session data; (b) converting subtest items cores or subtest total raw scores into scaled scores; (c) converting sums of scaled scores into composite index scores, percentile ranks, and upper and lower confidence intervals; (d) comparing DDTLA-5 scores to identify significant intraindividual differences and (e) obtaining a score summary and narrative report.

Reliability

Reliability of the DTLA-5 was investigated using estimates of content sampling and time sampling. Internal consistency reliability coefficients (content sampling) range from .79 to .90 for the subtests, from .87 to .95 for the subdomain composites, and from .95 to .98 for the domain and global composites. Time sampling was investigated using the test–retest technique. Test–retest coefficients range from .72 to .90 for the subtests, from .80 to .92 for the subdomain composites, and from .93 to .96 for the domain and global composites.

Validity

Evidence of the validity of DTLA-5 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 the DTLA-5 with those of other cognitive tests, such as the CAS2, PTONI, SB-5, UNIT2, WISC-IV, WISC-V, and WJ III. New and extensive criterion-prediction validity studies were conducted to demonstrate the validity of the DTLA-5’s subtests and composites, including diagnostic accuracy and receiver operating characteristic/area under the curve (ROC/AUC) analyses. Diagnostic accuracy analyses are particularly rigorous techniques for establishing validity involving the computation of a test’s sensitivity index, specificity index, and ROC/AUC. These studies indicated that the DTLA-5 is a highly valid measure of cognitive ability.

Construct-identification validity is demonstrated by including studies of age differences, subgroup performance, relationship to achievement, and confirmatory factor analysis of the test’s structure. These studies indicated that the DTLA-5’s internal structure is sound and its results are valid for a wide variety of subgroups, as well as for a general population

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

Ortiz PVAT Licenses

Ortiz PVAT Licenses

Online Scoring

Online Scoring

Supplementary Materials

Supplementary Materials

Other Materials

Other Materials

DTLA-5 Picture Book 2

DTLA-5 Picture Book 2

Default Title
CA:
$201.00

DTLA-5 Picture Book 1

DTLA-5 Picture Book 1

Default Title
CA:
$180.00

DTLA-5 Examiner's Manual

DTLA-5 Examiners Manual

Default Title
CA:
$121.00