Peter Honey and Alan Mumford developed a 'Learning Styles Questionnaire' to evaluate a person's learning preferences.
The learning styles questionnaire: 80-item version [Print book] by 
The learning styles helper's guide [Print book] by This guide from the University of Leicester explains the characteristics of the four learning styles (activist; theorist; pragmatist and reflector).
The Myers-Briggs Type Indicator (MBTI) is a personality test, based on Carl Jung's theories of psychological type.
Myers-Briggs Foundation - explanation of the sixteen personality types.
There are free versions of the MBTI available, which can give you a basic understanding of your personality type:
Based on the work of expert Stella Cottrell, international bestselling author of The Study Skills Handbook, this interactive resource will help you hone and develop your study skills at your own pace. Each module has been carefully designed so you can assess your current proficiency, track your progress, become more confident and get the most out of your course.
Click on 'Continue with your Institution account'.
The manual of learning styles by 
VARK modalities (visual; auditory; read/write and kinesthetic) were developed by Neil Fleming, building on VARK learning styles.
The VARK self-assessment questionnaire is free online.
These helpsheets explain how to develop effective learning strategies based on your VARK preferences.
The Felder-Silverman model was originally defined in a journal article: Felder, R. M. and Silverman, L. K., 1988. Learning and teaching styles in engineering education. Engineering education [online], 78 (7), 674-681.
The Index of Learning Styles is a questionnaire used to assess a learner's preferences according to the Felder-Silverman model (active/reflective; sensing/intuitive; visual/verbal and sequential/global).
A summary of learning styles and strategies explains the four dimensions of learning style preferences in the Felder-Silverman model.