1. based on personal accounts rather than facts or research; relating to anecdotes
Usage: less common than ‘anecdotal’

Examples

• The report was largely anecdotical, lacking statistical evidence.
• Her anecdotical observations about student behavior were interesting but unproven.
• The doctor dismissed the anecdotical claims about the treatment’s effectiveness.
• Most of the evidence presented was anecdotical rather than clinical.
• The book contains anecdotical stories from various travelers.
• His anecdotical approach to history made the lecture engaging but unreliable.