History
Herman Von Ebbinghaus is generally credited with developing the first sentence completion test in 1897.[1] Ebbinghaus’s sentence completion test was used as part of an intelligence test.[2]

Carl Jung’s word association test may also have been a precursor to modern sentence completion tests.

In recent decades, sentence completion tests have increased in usage, in part because they are easy to develop and easy to administer. As of the 1980s, sentence completion tests were the seventh most widely used personality assessment instruments.[3]

Another reason for the increased usage of sentence completion tests is because of their superiority to other measures in uncovering conflicted attitudes.[4]

Some sentence completion tests were developed as a way to overcome the problems associated with thematic apperception measures of the same constructs.[2]

Uses
The uses of sentence completion tests include personality analysis, clinical applications, attitude assessment, achievement motivation, and measurement of other constructs. They are used in several disciplines, including psychology, management, education, and marketing.

Sentence completion measures have also been incorporated into non-projective applications, such as intelligence tests, language comprehension, and language and cognitive development tests.[5]

Examples of sentence completion tests
There are many sentence completion tests available for use by researchers. Some of the most widely used sentence completion tests include:

Rotter Incomplete Sentence Blank (assesses personality traits; perhaps the most widely used of all sentence completion tests).
Miner Sentence Completion Test (measures managerial motivations).
Washington University Sentence Completion Test (measures ego development).
Data analysis, validity and reliability
The data collected from sentence completion tests can usually be analyzed either quantitatively or qualitatively.[6]

Sentence completion tests usually include some formal coding procedure or manual. The validity of each sentence completion test must be determined independently and this depends on the instructions laid out in the scoring manual.

Compared to positivist instruments, such as Likert-type scales, sentence completion tests tend to have high face validity (i.e., the extent to which measurement items accurately reflect the concept being measured). This is to be expected, because in many cases the sentence stems name or refer to specific objects and the respondent is provides responses specifically focused on such objects.

References
^ Rhode, A.R. (1957) The Sentence Completion Method. New York: The Ronald Press 1957; Lah, M.I. (1989). Sentence Completion Tests. In C.S. Newmark (Ed.), Major psychological assessment instruments, Vol II (pp 133-163). Boston: Allyn and Bacon.
^ a b Ibid.
^ Holaday, M., Smith, D.A. & Sherry, A. (2000). Sentence completion tests: A review of the literature and results of a survey of members of the society for personality assessment. Journal of Personality Assessment, 74, 371-383.; Lubin, B., Larsen, R.M. & Matarazzo, J.D. (1984). Patterns of psychological test usage in United States: 1935-1982. American Psychologist, 39, 451-454.
^ Lawrence C. Soley & Aaron Lee Smith (2008). Projective Techniques for Social Science and Business Research. Milwaukee: The Southshore Press.
^ Ibid.
^ Ibid.