13:23 Use a Minimum of Two Radio Buttons
Strength of Evidence:
Document Type: Guideline
Screen-Based Controls (Widgets)
Never use one radio button alone.
Use at least two radio buttons together. If users can choose not to activate any of the radio button choices, provide a choice labeled ’None.’
Bailey, R.W. (1996). Human performance engineering: Designing high quality professional user interfaces for computer products, applications and systems (3rd ed.). Englewood Cliffs, NJ: Prentice-Hall.
Fowler, S. (1998). GUI Design Handbook. New York: McGraw-Hill.
Marcus, A., Smilonich, N., & Thompson, L. (1995). The Cross-GUI Handbook. Reading, MA: Addison-Wesley.