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Psychometrics in Whole Brain Creativity Assessments

Learn about the different measurement approaches in psychometrics, including nominal, ordinal, interval, and ratio scales, and the types of reliability and validity in assessments. See how these concepts are applied in the NBI™ tool. Contact us at www.globalinsightsconsulting.com

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Psychometrics in Whole Brain Creativity Assessments

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  1. Certification Training: WholeBrain Creativity Assessments (NBI™)

  2. PSYCHOMETRICS

  3. Description:Approaches for measuring different concepts in the sciences. Nominal: Assigning numbers to define different categories (i.e. Using 1= male and 2 = female). No order is implied. Ordinal: Assigning numbers to represent rank ordering of choices. (i.e. Results of a race-- 1,2,3; Rank order of preferences). No information about the “magnitude” of differences between each of the rankings is implied. Interval: More quantitative with consistent units. Magnitude of differences is measured. (i.e. Fahrenheit temperature scale; Likert Scale). The zero is not meaningful, thus ratios are also not meaningful. Ratio: Magnitude of differences is measured and the zero is meaningful. Thus ratios are also meaningful. (i.e. Kelvin temperature; Time) Scales – Types

  4. Description:Is the tool free from random error? Are the results of the tool consistent? Types of Reliability: Test-Retest Reliability: How close are the results when the tool is taken on multiple occasions over time? Internal Consistency: Do the questions related to each area (i.e. construct) correlate well with each other? * Dr. Liezel Korf, 2004 (Independent Research Psychologist) Reliability – Types

  5. Academic Standard:Alpha > .70 is considered reliable Test-Retest Reliability:Population of teachers (N = 37) given the tool twice eight months apart. QuadrantAlpha L1 .85 L2 .84 R1 .87 R2 .92 * Dr. Liezel Korf, 2004 (Independent Research Psychologist) Reliability Outcomes– Test-Retest

  6. Reliability Outcomes– Consistency Internal Consistency:Broad population of South African business people, teachers, police, miners (N = 1588). QuadrantAlpha L1 .68 L2 .75 R1 .82 R2 .77 * This analysis requires interval data although in the case of this assessment the data are ipsative. * Dr. Liezel Korf, 2004 (Independent Research Psychologist)

  7. Description:Does the tool measure what it says it measures? Types of Validity: Face Validity: Would experts agree that it measures what it tries to measure? Convergent Validity: Does it overlap with assessments that measure similar constructs? Discriminant Validity: Is it different from assessments that measure different constructs? * Dr. Liezel Korf, 2004 (Independent Research Psychologist) Construct Validity – Types

  8. Description:Does the tool measure what it says it measures? Types of Validity: Face Validity: The tool is based on the science of Torrance, Herrmann, Moore and Neethling. The growing scientific literature suggests the constructs are robust. Convergent Validity: The NBI overlaps with the MBTI in several areas suggesting they are measuring some similar constructs. MBTI Correlations: L1 with Sensing (S) and Thinking (T) R1 with Intuition (N) L2 with Sensing (S) and Judging (J) R2 with Feeling (F) and Perception (P) * Dr. Liezel Korf, 2004 (Independent Research Psychologist) Construct Validity – Outcomes

  9. THANK YOU! Contact Info: www.globalinsightsconsulting.com Krister.Lowe@globalinsightsconsulting.com Antony.Hacking@globalinsightsconsulting.com (ahacking@aol.com)*

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