====== The validity of causal research  ======
{{vimeo>132532691?large|The validity of causal research}}

==== PowerPoint ====
  * {{:research_methods: Microlecture 4 3 The validity of causal research 20150812.pptx| The validity of causal research}}

{{tag>setting dependent_variable endogenous_concept independent_variable exogenous_concept external_invalidity internal_invalidity statistical_conclusion_validity measurement_validity data_collection_bias}}
{{tag>research_methods:ut research_methods:video}}
/* Number 4 3 */