Understanding Equal-Appearing Interval Attitude Scale Construction Steps

An equal-appearing interval attitude scale, often associated with L.L. Thurstone, is a method used to measure attitudes by assigning numerical values to statements, reflecting the intensity of the attitude they express. The construction of such a scale involves several specific steps to ensure its reliability and validity.

Let's break down the typical sequence of steps involved in constructing an equal-appearing interval attitude scale from the options provided:

1. Selection of statements for the final scale
2. Collection and editing of statements
3. Planning for the scale
4. The sorting procedure
5. Establishment of reliability and validity of the scale

Analyzing the Correct Order of Equal-Appearing Interval Scale Construction

To construct an equal-appearing interval attitude scale, the process follows a logical flow aimed at developing a set of statements that represent different points along a continuum of the attitude being measured. The standard steps are as follows:

1. Planning for the scale (C): Before anything else, you must clearly define the attitude you want to measure, the target population, and the purpose of the scale. This sets the foundation for the entire process.
2. Collection and editing of statements (B): This involves gathering a large pool of statements expressing various opinions or feelings about the attitude object, ranging from extremely favorable to extremely unfavorable. These statements are then edited for clarity, relevance, and avoidance of ambiguity. Typically, hundreds of statements are collected at this stage.
3. The sorting procedure (D): A group of judges (usually 50 to 300) are asked to sort the collected statements into a predetermined number of piles (typically 7, 9, or 11). Each pile represents a point on a continuum, from least favorable to most favorable, regarding the attitude object. The judges are instructed to consider the degree of favorableness expressed by each statement, not their own opinion.
4. Selection of statements for the final scale (A): Based on the judges' sorting, two statistical values are calculated for each statement: the scale value (median or mean rating by judges) and the Q-value (a measure of dispersion or ambiguity based on the interquartile range of the judges' ratings). Statements with clear scale values and low Q-values (indicating high agreement among judges) are selected for the final scale. Typically, around 20-30 statements are chosen for the final scale, representing a range of scale values across the continuum.
5. Establishment of reliability and validity of the scale (E): Once the final set of statements is selected and assigned their scale values, the scale needs to be tested. Reliability refers to the consistency of the scale's measurement, while validity ensures it actually measures the intended attitude. Various statistical methods are used to assess these aspects using data collected from the target population.

Therefore, the correct sequence of steps is Planning, Collection and editing, Sorting procedure, Selection of statements, and Establishment of reliability and validity. This corresponds to the order C, B, D, A, E.

Conclusion on Equal-Appearing Interval Scale Steps

The correct sequence for constructing an equal-appearing interval attitude scale is C, B, D, A, E. This systematic process ensures that the scale is built upon statements that are perceived by judges to represent points along an attitudinal continuum, making it a robust tool for attitude measurement once its reliability and validity are established.

Revision Table: Steps in Constructing Thurstone Scale

Additional Information: Attitude Scale Construction

While the equal-appearing interval scale (Thurstone scale) is one method for constructing attitude scales, other prominent methods exist. The Likert scale, for instance, is another widely used method. Unlike the Thurstone scale where judges determine statement values, the Likert method involves respondents indicating their degree of agreement or disagreement with a set of statements, and the scores are summed up. The Bogardus Social Distance Scale is another type focusing specifically on measuring willingness to interact with different social groups. Each method has its strengths, weaknesses, and specific construction processes, making the choice dependent on the research question and context. Understanding the steps for each type, like the detailed steps for the equal-appearing interval scale, is crucial for accurate psychological and social measurement.