Subject: Twin achievement 43 general knowledge quiz questions. It should take around 9 minutes to complete all the questions.

Subject: Twin happiness 14 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Twin laughter 32 general knowledge quiz questions. It should take around 7 minutes to complete all the questions.

Subject: Twin adjustment 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Twin connection 12 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Identical twin zygosity 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Twin empathy 12 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Making contact 16 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: White Island 11 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Tongariro National Park 17 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Group validation protocol 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Movie overview 13 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Skull and crossbones 30 general knowledge quiz questions. It should take around 6 minutes to complete all the questions.

Subject: Government cover-ups 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Diagnostic reliability 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Empirical test reliability 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.