INTERNAL

• Spurious correlation occurs when two variables are correlated but don't have a causal relationship.
• Causation means that one event cause another even to occur. it can only be determined from appropriately designed experiment
• Correlation means there is a relationship or pattern between the values of two variables.
• Scientific method includes: observation, questioning, research, hypothesis, experiment, analysis data, establishing conclusion, and peer review (it goes in a cycle)
• Sample bias is when the experimenter has bias towards the investigation
• Confirmation bias is the tendency to interpret evidence as confirmation if your exisiting beliefs.
• Pseudoscience is contradictory, exaggerated or unfalsifiable claims
• Primary information is information that is gathered directly from the source, such as interviews, surveys, and observations.
• Secondary information is information that is not original to the source but is derived from another source.
• Empirical Evidence


  Evidence obtained through observation and experience, supporting scientific theories and hypotheses.
• Anecdotal Evidence


  Evidence based on personal experiences or stories, often subjective and limited in scope.
• The double-blind experiment is the when the experimenter doesn't know which option is which as well as the person getting investigated
• 30 percent of the population should be investigated
• Conventions are units, sf, diagrams and graphs
• Double-blind is to reduce the placebo effect and bias