There are two main types of attitude scales: single item scales and multi-item scales. Single item scales measure attitude using a single question or statement, while multi-item scales are needed when attitude cannot be fully captured by one question. Examples of single item scales include itemized category scales, rank order scales, and comparative scales. Multi-item scales include semantic differential scales, staple scales, and Likert scales, which measure attitude using several questions or statements rated on a numeric scale.