Biometrics/Scientific Method Flashcards
Variable
Parts of an experiment which can be changed or measured. Only one should change during an experiment.
What is a dependant variable
The variable you want to measure the change of during an experiment. This is the variable that is impacted. Goes on the y axis of a graph.
Independent Variable
The variable you change the value of between experiments. It is the thing which you think will have an impact on the experiment. Goes on the x axis of a graph.
Controlled Variable
Anything that can effect the experiment but is held at a constant.
Observation
Information we gather directly from our senses.
Inference
Ideas that explain our observations. Not always true and multiple inferences can be made for 1 observation.
Aim
Relates to a cause and effect relationship between variables. E.G “The tomatoes height will increase when the light given is increased.”
Hypothesis
A possible prediction that will be attempted to prove or contradict through an experiment. Can never be proven only supported; but it can be disproven. Needs to be about an event that can be measured or tested.
Quantitative Data
Data that can be counted or put on a numerical scale.
Qualitative Data
Data that describes qualities or characteristics.
Benefit of Laser Triangulation
Resolution and accuracy
Disadvantage of laser triangulation
Shiny and transparent items are difficult to scan
Benefit of contact based
Precise and good at scanning 3d, transparent and shiny objects
Disadvantage of contact based
Slow speed and has difficulties working with ‘organic shapes’
Advantage of structured light
Speed, resolution and ability to scan people
