During the process of verbal communication, the message can get muddled or confusing due to the use of jargon, ambiguity or a difference in defining the words used. That's why I believe when it comes to nonverbal communication problem solving test strategies charts and visual aids would definitely be very helpful. For instance in the reading labeling the figures helped the little girl on the UNIT test. That helped her remember what she was looking at. .
Next the article discusses psychometric factors in reading the article I've come to the conclusion that psychometric factors are those aspects of a test or a measure that say how good the test or measure is. They deal with things like the reliability and validity of a measure. How accurate is it at measuring a construct and does it measure what it's supposed to measure. This article also discusses normative samples and this is a group or participants that is selected and their performances will be compared and there is three categories that is looked at size, representativeness and recency. To my understanding in reading the article a norm referenced test uses a sample from the general population to determine what is considered to be typical or normal in that particular population. I feel that, those who design tests must choose a population they feel represents the target population to be evaluated. There are three conditions used when determining the normative sample, size is important because it decreases the margin of inaccuracy by using a rationally large number of participants. For example if you want to measure a certain aspect or commonality of 10 year olds you couldn't use a small group because that wouldn't be a good representation of the average 10 year old. According to the article you would have to use a significant number of participants if you want your study to be valid. .
Next criteria we have is representativeness and a representative sample is one that has strong external validity in relationship to the objective population the sample is meant to exemplify.