✅ Validity §

a valid measure measures what it is meant to measure

Internal validity: §

• High: no alternative explanations for a result
• Low: results can be explained by confounds
• Reasons for low internal validity: THIS MESS

Influencing Internal validity §

• 👍 controling extraneous variables (explaination)
• 👍 standardized instructions
• 👍 ⚖️ Counter balancing
• 👎 Research bias
• 👎 low 😌 Reliability

External validity §

• High: high extent of generalizability
• Low: low extent of generalizability

Influencing External validity §

• 👍 🎰 Random Sampling
• 👍 Natural setting
• 👎 homogenuous sample