scholarly journals Regression toward the Mean: Its Etiology, Diagnosis, and Treatment

2001 ◽  
Vol 46 (1) ◽  
pp. 72-76 ◽  
Author(s):  
Da vid L Streiner
Keyword(s):  
Diagnosis And Treatment ◽  
The Mean ◽  
Regression Toward The Mean

Reversion Toward the Mean Independently of Regression Toward the Mean

Methodology ◽  
2009 ◽  
Vol 5 (1) ◽  
pp. 3-6 ◽  
Author(s):  
Merton S. Krause
Keyword(s):  
Random Error ◽  
Evaluation Studies ◽  
Internal Validity ◽  
Intervention Evaluation ◽  
Population Mean ◽  
Experimental Intervention ◽  
Sample Data ◽  
The Mean ◽  
Regression Toward The Mean

There is another important artifactual contributor to the apparent improvement of persons subjected to an experimental intervention which may be mistaken for regression toward the mean. This is the phenomenon of random error and extreme selection, which does not at all involve the population regression of posttest on pretest scores but involves a quite different and independent reversion of subjects’ scores toward the population mean. These two independent threats to the internal validity of intervention evaluation studies, however, can be detected and differentiated on the sample data of such studies.

Arthroscopic Diagnosis and Treatment of Dorsal Wrist Ganglion

2001 ◽  
Vol 26 (6) ◽  
pp. 547-549 ◽  
Author(s):  
S. NISHIKAWA ◽  
S. TOH ◽  
H. MIURA ◽  
K. ARAI ◽  
T. IRIE
Keyword(s):  
Diagnosis And Treatment ◽  
The Mean ◽  
Dorsal Wrist Ganglion

Thirty-seven patients with dorsal wrist ganglia underwent arthroscopic resection. The mean follow-up was 20 months, and no complications were encountered. The ganglia were classified into three types according to their arthroscopic appearance. This classification helps to determine the amount of dorsal capsular resection required.

Role of laparoscopic in diagnosis and treatment of undescended testis in children at Viet Duc Hospital

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Viet Hoa Nguyen
Keyword(s):  
Laparoscopic Surgery ◽  
Undescended Testis ◽  
Correct Diagnosis ◽  
Diagnosis And Treatment ◽  
Highly Sensitive ◽  
The Mean ◽  
The Right ◽  
Time Of Operation

Abstract Introduction: Evaluating the role of laparoscopic for diagnosis and treatment of undescended testis in children. Material and Methods: Restrospective study, between 6/ 2014 and 6/2017. All the patients are aged from 1 to 16 years with undescended testis underwent laparoscopic surgery for diagnosis and treatment in Deparment of pediatric surgery – Viet Duc hospital enrolled. Results: Of 95 patiens in total had 106 undescended testis diagnosed and treated by laparoscopy. The mean age of patients was 7,5 ± 3,8 years. 44,2% undescended were on the left side, 44,2% were on the right and 11,6% were undescended bilateral. The correct diagnosis by ultrasound accounted in 79,4%. The locations of testis diagnosed by laparoscopic are : intra abdomen in 45,3%, deep inguinal orifice in 16,9%, extra inguinal orifice in 26,4%, no testicle found in 11,4%. The mean time of operation were 67,33± 28,01 pht. Scrotal positions were achieved 74,5%, remove atrophic testis accounted in 7,6%. Stephen- Flowler technique including step I were in 4,7%, step II in 1,9%. The outcome evaluated by testicular positions following 3 months after operation are : good in 79,2%, moderate 13,2%, poor in 7,6%; By classification of Aubert are : good in 81,1%, moderate in 11,3% and poor in 7,6 %. Conclusion: Laparoscopic surgery is not only a highly sensitive diagnostic method to find accurately the location and size of the testes, but also the most effective method to treat impalpable undescended testes.

Comment on “Three Aspects of Cognitive Development”

1978 ◽  
Vol 46 (1) ◽  
pp. 129-130 ◽  
Author(s):  
William Asher
Keyword(s):  
Cognitive Development ◽  
Experimental Design ◽  
Age Groups ◽  
Quasi Experimental ◽  
The Mean ◽  
Regression Toward The Mean ◽  
Two Age Groups

In Exp. 2 of Siegler's 1976 study a faulty quasi-experimental design was used. The stated results, that older and younger children with apparently equal initial performance derived different benefits from identical experience, can also be explained by a confounding with regression toward the mean. These effects are a result of a selective matching of subjects from two age groups on a fallible variable correlated with age.

Markov Chains and Regression toward the Mean

1991 ◽  
Vol 26 (1) ◽  
pp. 115-125 ◽  
Author(s):  
Robert W. Kolb ◽  
Ricardo J. Rodriguez
Keyword(s):  
Markov Chains ◽  
The Mean ◽  
Regression Toward The Mean

Physical Attractiveness and Occupational Prestige among Male College Graduates

1980 ◽  
Vol 47 (3_suppl) ◽  
pp. 1275-1280 ◽  
Author(s):  
Jack Sparacino
Keyword(s):  
Socioeconomic Status ◽  
Physical Attractiveness ◽  
College Graduates ◽  
Archival Data ◽  
Occupational Prestige ◽  
Graduate Degree ◽  
Male College ◽  
The Mean ◽  
Regression Toward The Mean

A set of archival data was used to test the hypothesis that physical attractiveness is positively associated with socioeconomic status among men. Consistent with earlier research, more attractive men earned equivalent grades while undergraduates. They were also no more likely to have subsequently earned a graduate degree or to have held jobs characterized by higher status as indexed by Duncan (1961) prestige scores. Attractiveness itself was stable over the 25 yr. for those initially judged to be intermediate in attractiveness. Those who were initially most and least attractive were judged to have declined and increased, respectively, over the period in question, providing evidence for a regression toward the mean.

scholarly journals Intelligence, consistency, and Emerson's dilemma

2019 ◽  
Author(s):  
Kimmo Sorjonen ◽  
Tomas Hemmingsson ◽  
Bo Melin
Keyword(s):  
Reading Ability ◽  
Statistical Power ◽  
Positive Association ◽  
Response Style ◽  
Measurement Instruments ◽  
Negative Effect ◽  
The Mean ◽  
Regression Toward The Mean ◽  
Response Consistency ◽  
Large Representative

In a large representative sample of Swedish male conscripts (N = 49,246), we demonstrate a positive association between intelligence and response consistency on items measuring endorsement of a strong military defense. This association is accentuated, to some degree, by an apparent difficulty to handle reversed items among those with low intelligence. Consequently, due to regression toward the mean, reversed items in measurement instruments would tend to have a negative effect on statistical power when analyzing the association between whatever the instrument is measuring and intelligence. On the other hand, the presence of reversed items could mitigate bias in the measurement due to an acquiescent response style among those with low intelligence. Lack of motivation/carelessness and inadequate reading ability among some subjects are two possible confounders for the found association in the present study.

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