How Science Works Glossary

HideShow resource information
Accuracy
Measurement is close to true value
1 of 18
Anomalous Data
Measurements fall outside the expected range
2 of 18
Causal Relationship
Results are caused by a change in another variable
3 of 18
Confounding Variable
A variable other than the independent which affects the outcome. They must be kept constant or monitored
4 of 18
Control Experiment
Uses a method which limits the possibility of a confounding variable affecting the results
5 of 18
Control Group
Treated in exactly the same way as the experimental group but do not receive the actor which is being measured. Allows comparison and makes data valid
6 of 18
Correlation
Relationship between two variables but is not causal
7 of 18
Dependent Variable
Value is measured for each change in independent variable
8 of 18
Double-blind trial
Neither scientist or participant know the treatment the individual is receiving
9 of 18
Independent Variable
Values are changed
10 of 18
Placebo
A dummy replica of the substance given to the experimental group given to the control. Produces valid data
11 of 18
Precision
Smallest scale division on the measuring instrument
12 of 18
Probability
Likelihood of an event occurring expressed mathamtically
13 of 18
Random Distribution
Data is collected at random to avoid observer bias
14 of 18
Random errors
Errors caused by human error, faulty technique or equipment
15 of 18
Reliability
If the experiment was repeated the results would be the same. Measured by repeating measurements
16 of 18
Validity
Data is affected by the independent variable only and is supported by reliable and valid data
17 of 18
Zero Errors
Instruments which have an incorrect zero
18 of 18

Other cards in this set

Card 2

Front

Measurements fall outside the expected range

Back

Anomalous Data

Card 3

Front

Results are caused by a change in another variable

Back

Preview of the back of card 3

Card 4

Front

A variable other than the independent which affects the outcome. They must be kept constant or monitored

Back

Preview of the back of card 4

Card 5

Front

Uses a method which limits the possibility of a confounding variable affecting the results

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Practical applications of biology resources »