research method in which the psychologist observes the subject in a natural setting without interfering
What is naturalistic observation
The name of the effect where a participant changes his or her behavior because they are aware they're being observed
The Hawthorne Effect
An arrangement of data in a table that indicates how often a particular score or observation occurs
What is a frequency distribution
the group to which an independent variable is applied
What is the experimental group
participants are intentionally picked to represent proportionally the population that is being studied
What is a stratified sample
An experiment where the participants nor the experimenters know which participants received which treatment
What is a double-blind experiment
The branch of statistics that lists, summarizes and organizes data in a practical way (makes it easier to draw conclusions)
What is descriptive statistics
a statement that defines the exact methods used in experimental research
What is operational procedure
When the findings from a sample can be applied and generalized to the whole population, it is said that the sample has
What is external validity
an experiment where the participants do not know if they have received the treatment or the placebo
What is a single-blind experiment
The three measures of central tendency?
Mean, median, mode
the variable that the research manipulates or changes in an experiment
What is independent variable

What is a negative correlation
When is mode BEST used?
With non-numerical data
You are testing to see if a new plant fertilizer increases sunflower size. You put 20 plants of the same height and strain into a location where all the plants get the same amount of water and sunlight. One half of the plants get the regular fertilizer. The other half of the plants get the new fertilizer. Which is the experimental group and which is the control group?
EG: Plants exposed to new fertilizer
CG: Plants exposed to regular fertilizer
A type of treatment that resembles medical therapy but has no actual medical effects
What is placebo
Numerical methods used to determine whether research data support a hypothesis or whether results were due to chance
what is inferential statistics
A researcher wants to study the effects of a strobe light on a person's reading comprehension. The independent variable is this and the dependent variable is this
IV= strobe light
DV= reading comprehension
Before starting an experiment researchers are required to submit a plan to a Committee for approval or rejection of the experiment based on...
What is ethics