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Lecture 2

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Department
Psychology
Course
PSYCH 2TT3
Professor
Reuven Dukas
Semester
Fall

Description
PNB  2XC3   Week  2   Sept.  17,  2013   Acupuncture   • Purpose:  reducing  pain     • Question:  should  you  pay  for  acupuncture  treatment?     • Assumption/theory:  inserting  needles  at  blocked  acupuncture  points  can  restore  Qi  (“Chee”  =  life  energy)  when   the  ying  &  yang  are  out  of  balance,  thus  stimulating  healing.     • A  randomized  controlled  experiment:   o Double  blind   o Acupuncture,  sham  acupuncture,  no  acupuncture  (“waiting  list”)   o Results:  %  people  reporting  >50%  reduction  in  days  w/  headache   § 51%  =  in  acupuncture  trt   § 53%  =  in  sham  acupuncture  trt   § 15%  =  in  no  acupuncture  trt   o Placebo  effect   • There’s  no  critical  scientific  evidence  that  acupuncture  relieves  pain.     The  Scientific  Method   • Define  the  question     • Gather  info  &  resources     • Form  hypothesis     • Plan  experiments     • Do  experiments  &  collect  data     • Analyze  data     • Interpret  data  &  draw  conclusions  that  serve  as  a  starting  point  for  new  hypotheses     • Communicate  results       Blind  Experiment:  The  person  collecting  the  data  is  blind  to  subjects’  assignment  to  treatments.     Double  Blind  Experiment:  Both  data  collector  &  subjects  are  blind  to  treatments.  Relevant  for  human  subjects  only.     Why  should  experiments  be  blind  or  double  blind?   • To  prevent  experimenter  bias,  subject  bias,   &  the  placebo  effect     GROUP  EXERCISE:  List  2  ultimate  &  2  proximate  questions  about  feeding.   • Proximate:  How  do  we  digest  food?  How  do  we  know  what  foods  to  eat?  How  does  feeding  affect  our  fitness?   What  mechanisms  cause  us  to  overeat?  What  mechanisms  make  us  fee
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