Configuring the WPPSI-IV/WIAT-III Score Report

Primary Composite Score Confidence Interval

Select the desired confidence interval for the primary composite score.

• Confidence Intervals are used to determine the reliability of the score. The selected confidence interval gives the probability that the interval produced in the results includes the true value of the parameter.

Primary Mean Comparison Selections

• Select the desired significance level, base rate reference group, and comparison scores for the index-mean comparison.

• Select the desired significance level for the subtest-mean comparison.

Primary Pairwise Comparison Selections

• Select the desired significance level and base rate reference group for an index-index comparison.
• Select the desired significance level for a subtest-subtest comparison.

• Confidence Intervals are used to determine the reliability of the score. The selected confidence interval gives the probability that the interval produced in the results includes the true value of the parameter.

Ancillary Comparison Selections

The two composite scores are being compared.

• Select the desired significance level and base rate reference group for the index-index comparison.
• Select the desired significance level for a subtest-subtest comparison and a CAR-CAS comparison.

Substitution of Subset Scores

In some clinical situations, such as when a child’s physical condition interferes with performance, you may choose to substitute a supplemental subtest for a core subtest. Also, if a core subtest is invalidated for any reason, substitution may be necessary. It is not appropriate to substitute a supplemental subtest for a valid core subtest for the sole purpose of changing a composite score. Substitution rules apply.

Tables and Graphs

This section allows you  to select features you would like to include in the WPPSI-IV/WIAT-III combo report. By default, all of these options are pre-selected except for Subtest Standard Score Differences unless the criteria was set previously and run on a prior report. In this case, settings for the previous report are returned.

Except for the Pattern of Strengths and Weaknesses Model, any of these features can be deselected.

NOTE:: The Pattern of Strengths and Weaknesses Model and the Subtest Standard Score Differences provide additional Report fields that are specific to these sections.

Additional Scores

If selected, the generated reports will include growth scores.

Norms

This section allows you to evaluate the examinee's scores based on either age-based norms or grade-based norms.

By default,  Age- Based norms are selected.

However, If the examinee is 19:11 or younger, the Grade-Based Norms data is available for selection.

Significance Levels

This section allows you to select levels of significance.

• Confidence Intervals are used to determine the reliability of the score. The selected confidence interval gives the probability that the interval produced in the results includes the true value of the parameter.
• Composite Level Differences - Differences between composite standard scores (i.e., subtract the standard score for one composite from the standard score for another composite, the difference between them is a composite level difference).
• Pattern of Strengths and Weaknesses Discrepancy - The pattern of differences between a student’s Processing Strength (generally the student’s highest index score on an ability test) and his/her Processing Weakness (generally the student’s lowest index score on an ability test) and between a student’s Processing Strength and his/her Achievement Weakness (this can be any WIAT-III score, usually it will be a standard score below 85. It can be at the subtest level or at the composite level). The pattern is important because both of these differences must be significant for the student to fit the profile of a student with a learning disability
• Radio buttons, are set to the first available selection of each item by default. However, if the criteria was set and run on a previous report, the settings from the previous report are returned.

Ability-Achievement Discrepancy

This section allows you to conduct an ability-achievement discrepancy (AAD)  for six of the WPPSI-IV Ability Scales.

There are two primary methods for conducting an AAD analysis: the predicted-difference method and the simple-difference method. The predicted-difference method uses the ability score to predict an achievement score, and then the predicted and observed achievement scores are compared. The simple-difference method compares the observed ability and achievement scores. In both methods, the statistical significance and base rate of each discrepancy should be considered.

Radio buttons, are set to the first available selection of each item by default. However, if the criteria was set and run on a previous report, the settings from the previous report are returned.