Observation vs Inference An observation is actually what

Observation vs. Inference • An observation is actually what we perceive using our senses - touch, smell, sound, sight – in chemistry, we never use taste.

Observation vs. Inference • A perception is information from our senses. • Be CAREFUL – Our brain can play tricks on us!

READY

Observation vs. Inference • Inferences are conclusions that we make based upon our observations and personal perceptions.

Why is this important? • If we want to be a good lab practitioners, we must be able to separate observation from inference (fact from fiction) • A good lab practitioners has seen something and can accurately communicate the information as facts.

How to be a good lab practitioners 1. Pay attention to details – Systematically observe the entire event from one end to the other – Look at EVERYTHING! (This is not easy)

How to be a good lab practitioners 2. Turn off your personal bias (filters). – Everything that you observe may be important –

How to be a good lab practitioners 3. Don’t jump to conclusions. – – Your personal knowledge and experience may lead you to the wrong conclusion. The more information you have, the better your conclusions will be later

How to be a Good Witness 4. Write everything down. – Our memories are faulty. – Evidence allows other to see the same facts and interpret them in different ways.