IVA+Plus^TM
Standard scale scores

IVA+Plus standard scale scores are presented in the form of charts, graphs, numeric raw scores and numeric quotient scores. As is the case for most IQ tests, quotient scores have a mean of 100 and a standard deviation of 15. These familiar interpretative guidelines make interpretation easy. An interpretive flowchart is available in the IVA+Plus help files that provides you with a step-by-step, systematized guide to interpreting test results. The Narrative Interpretive Report Writers are based on this flowchart.

On the first page of the IVA+Plus Standard Scales Analysis are visual and auditory validity indicators. These important indicators tell you if the test taker made so many random responses that the rest of the test data are meaningless.

IVA+Plus scores are divided into four categories — Attention, Response Control, Attribute and Symptomatic. Primary diagnostic scales are the Full Scale Response Control Quotient and the Full Scale Attention Quotient. The Full Scale Response Control Quotient is based on separate Auditory and Visual Response Control Quotient scores. These Response Control Quotient scores are derived from visual and auditory Prudence, Consistency and Stamina scales.

• Prudence is a measure of impulsivity and response inhibition as evidenced by three different types of errors of commission.
   

• Consistency measures the general reliability and variability of response times and is used to help measure the ability to stay on task.
   

• Stamina compares the mean reaction times of correct responses during the first 200 trials to the last 200 trials. This score is used to identify problems related to sustaining attention and effort over time.

The Full Scale Attention Quotient is derived from separate Auditory and Visual Attention Quotients. The Attention Quotient scores are based on equal measures of visual and auditory Vigilance, Focus and Speed.

• Vigilance is a measure of inattention as evidenced by two different types of errors of omission.
   

• Focus reflects the total variability of mental processing speed for all correct responses.
   

• Speed reflects the average reaction time for all correct responses throughout the test and helps identify attention processing problems related to slow discriminatory mental processing.

IVA+Plus Data Samples

Standard Scales

Investigator Raw Response Data

Investigator Quintile Performance

Investigator Multiple Session Comparison Graphs

Investigator Multiple Session Comparison Table

IVA+Plus Add-Ons

IVA+Plus Narrative Interpretive Report Writers

The Investigator

Foreign Language Option

Download A Free Trial of IVA+Plus

IVA+Plus Research Bibliography

The Fine Motor Regulation scale provides additional information by recording off-task behaviors with the mouse — multiple clicks, spontaneous clicks during instruction periods, anticipatory clicks, and holding the mouse button down. In behavioral terms, the Fine Motor Regulation score quantifies fidgetiness and restlessness associated with small motor hyperactivity.

IVA+Plus’ Attribute scores provide clinicians with data regarding the client’s learning style. These scales are:

• Balance indicates whether the test taker processes information more quickly visually or aurally, or is equally quick in either modality.
   

• Readiness indicates whether the test taker processes information more quickly when the demand is quicker or when it is slower. Provides a subtle measure of inattention when the test taker just "can’t quite keep up."

IVA+Plus’ Symptomatic scales are auditory and visual Comprehension, Persistence and Sensory/Motor.

• Comprehension identifies random responding by measuring idiopathic errors. Research has shown this to be the single most sensitive sub-scale in discriminating ADHD.
   

• Persistence is a measure of motivation when the test taker is asked to do "one more thing." It can also reflect motor or mental fatigue.
   

• Sensory/Motor scales provide a measure of reaction time speed to simple, singular test stimuli (i.e., the "1"). These scales help screen for slow reaction times which may impair test performance or possibly indicate neurological, psychological or learning problems.

Taken together, the Attribute and Symptomatic scales help the clinician to understand a person’s best modality for learning, need for structure, motivation level, comprehension, and possible learning, emotional or neurological problems.