See: The Theory of Correlation Between Two Continuous Variables when One is Dichotomized Author(s): Robert F. Tate Source: Biometrika, Vol. 42, No. 1/2 (Jun., 1955), pp. 205-216
Cheers, Karl W. ________________________________ From: Paul Bernhardt [mailto:[email protected]] Sent: Tuesday, April 20, 2010 3:43 PM To: Teaching in the Psychological Sciences (TIPS) Subject: Re: [tips] Top 10 challenging concepts I am skeptical that the Biserial correlation can exceed an absolute value of 1. Can you provide an example in which it does that? Paul Bernhardt Dept of Psychology Frostburg State University pcbernhardt _at_ frostburg _dot_ edu On Apr 20, 2010, at 8:44 AM, Wuensch, Karl L wrote: Actually, there are some correlation coefficients that can exceed one (the biserial, for example). Tell your students to square r before comparing one with another. Give them a set of data and the plot and the accompanying negative r. Then invert or reflect one of the variables and present the plot and positive r. They should get the message then. Try a criminal courtroom analogy. Assume innocence. Type I = convict an innocent defendant. Type II = let a criminal get off. Cheers, Karl W. From: [email protected]<mailto:[email protected]> [mailto:[email protected]] Sent: Monday, April 19, 2010 8:43 AM To: Teaching in the Psychological Sciences (TIPS) Subject: Re: [tips] Top 10 challenging concepts A couple of editorial comments (unwanted I am sure but I don't care): differentiating between the phallic and genital stage Since there is very little validity or empirical support for Freud's theoretical constructs of development and personality, I would say that there is no need to waste precious class time on this distinction m- It helps the modern scientific psychologist not at all... Let the English, Philosophy or History prof deal with it. > -why a -7.0 correlation coefficient is more significant than a +5.0 There > are no such things as a -7.0 correlation coefficient or a 5.0 one. All "r"s range between -1.00 and +1.00 Nancy Melucci Long Beach City College Long Beach CA -----Original Message----- From: Mike Palij <[email protected]<mailto:[email protected]>> To: Teaching in the Psychological Sciences (TIPS) <[email protected]<mailto:[email protected]>> Cc: Mike Palij <[email protected]<mailto:[email protected]>> Sent: Sun, Apr 18, 2010 10:19 pm Subject: re: [tips] Top 10 challenging concepts On Sun, 18 Apr 2010 16:06:30 -0700, Michael Sylvester wrote: >I am attempting to compile a list of the top 10 challenging concepts >to explain to students.So far I have come up with the following from >my courses: > -Type 1 and type 2 error > - differentiating between the phallic and genital stage > -negative reinforcement > -positive punishment > -why a -7.0 correlation coefficient is more significant than a +5.0 > - assimilation and accomodation in Piagetian theory > - diathesis stress theory of schizophrenia Why do fools fall in love? -Mike Palij New York University [email protected]<mailto:[email protected]> P.S. Do Sylvesterian correlation coefficients exceed +/- 1.00? If so, how are they calculated? --- You are currently subscribed to tips as: [email protected]<mailto:[email protected]>. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=12993.aba36cc3760e0b1c6a655f019a68b878&n=T&l=tips&o=2094 or send a blank email to leave-2094-12993.aba36cc3760e0b1c6a655f019a68b...@fsulist.frostburg.edu<mailto:leave-2094-12993.aba36cc3760e0b1c6a655f019a68b...@fsulist.frostburg.edu> --- You are currently subscribed to tips as: [email protected]<mailto:[email protected]>. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13060.c78b93d4d09ef6235e9d494b3534420e&n=T&l=tips&o=2098 (It may be necessary to cut and paste the above URL if the line is broken) or send a blank email to leave-2098-13060.c78b93d4d09ef6235e9d494b35344...@fsulist.frostburg.edu<mailto:leave-2098-13060.c78b93d4d09ef6235e9d494b35344...@fsulist.frostburg.edu> --- You are currently subscribed to tips as: [email protected]<mailto:[email protected]>. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13441.4e79e96ebb5671bdb50111f18f263003&n=T&l=tips&o=2109 (It may be necessary to cut and paste the above URL if the line is broken) or send a blank email to leave-2109-13441.4e79e96ebb5671bdb50111f18f263...@fsulist.frostburg.edu<mailto:leave-2109-13441.4e79e96ebb5671bdb50111f18f263...@fsulist.frostburg.edu> --- You are currently subscribed to tips as: [email protected]<mailto:[email protected]>. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13060.c78b93d4d09ef6235e9d494b3534420e&n=T&l=tips&o=2115 (It may be necessary to cut and paste the above URL if the line is broken) or send a blank email to leave-2115-13060.c78b93d4d09ef6235e9d494b35344...@fsulist.frostburg.edu<mailto:leave-2115-13060.c78b93d4d09ef6235e9d494b35344...@fsulist.frostburg.edu> --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=2117 or send a blank email to leave-2117-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
