¿Qué significa first hand perspective ?

See a translation

"First hand" — You personally experienced it

"Second hand" — Someone else experienced it and told you about it

"Third hand" — Someone else experienced it who then told another person about it who then told you about it

These expressions can be used with the word "perspective", but often they are used with the word "information".

Example: "I don't know if it's true because it's second-hand information"



For official/academic research, often you use these terms:

"Primary source" — a publication written by the people who actually conducted the research/experiment "first hand"

"Secondary source" — a publication (e.g. summary, review, or analysis) written by people who cited/referenced a primary source (i.e. a publication based on second-hand information [information obtained from a primary source])

"Tertiary source" — a publication (e.g. encyclopedia or textbook) that indexes, compiles, consolidates, and/or summarizes many different publications together (i.e. a publication based on a compilation of information from many other sources)