If your sample is not part of norm group, reliability and validity may be suspect. The standard deviations are determined arbitrarily 2. There are a number of different formats employed . Most of which are self-report measures. Scaled items are the most common approach in measuring affective traits.
Length is important with age.
Age is also important. Each item includes a series of statements reflecting varying attitudes towards the same objective or event. Includes items with a small number of increasingly difficult, complex or value-loaded statements. Responding affirmatively to one item in the service implies a corresponding response to all the preceding statements. Sometimes in a Likert Scale all of the items can be of equal importance.