Acommercial testing company has developed a brand new test intended to measure the mathematical skills of students who possess limited english proficiency. there are three forms of the test at each grade level, and teachers are encouraged to use all three forms of the test during the school year. the sales reps of the company are collecting reliability evidence that will best them market the new test. what kind of reliability evidence seems most useful in this situation?

Equivalent forms

Explanation:

Parallel forms reliability which is also referred to as a equivalent forms reliability that tends to use a set of questions which is further divided in two equivalent forms, under which both sets tends to contain the questions that measure or evaluate the similar construct, skill or knowledge. These sets of question are then given to same individual from the sample within short time period and thus estimate of the reliability is then evaluated from these sets.