Positive and negative reinforcement with short- and long-term hospitalized schizophrenics in a probability learning situation.

1967 ◽  
Vol 72 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Titus L. McInnis ◽  
Leonard P. Ullmann
Author(s):  
J. Mark Eddy ◽  
Betsy J. Feldman ◽  
Charles R. Martinez

Aggression between students at school is a common problem, particularly within the context of the school playground. Key mechanisms in coercion theory, including positive and negative reinforcement for aggression and peer deviancy training, can operate with abandon on school playgrounds without adult supervision, monitoring, and appropriate intervention. The Linking the Interests of Families and Teachers (LIFT) multimodal preventive intervention, designed to address aggression on the playground, is described. The short-term and intermediate follow-up findings from a randomized controlled trial of LIFT on aggression on the playground as well as other forms of child antisocial behavior are overviewed. Long-term follow-up findings on the relations between playground aggression and antisocial behaviors during mid-adolescence and emerging adulthood are then reported. It is argued that to be effective, coercion theory–based prevention programs like LIFT need to continue across elementary school and into secondary school, rather than be delivered at only one point in time.


Swiss Surgery ◽  
2001 ◽  
Vol 7 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Robert ◽  
Mariéthoz ◽  
Pache ◽  
Bertin ◽  
Caulfield ◽  
...  

Objective: Approximately one out of five patients with Graves' disease (GD) undergoes a thyroidectomy after a mean period of 18 months of medical treatment. This retrospective and non-randomized study from a teaching hospital compares short- and long-term results of total (TT) and subtotal thyroidectomies (ST) for this disease. Methods: From 1987 to 1997, 94 patients were operated for GD. Thirty-three patients underwent a TT (mostly since 1993) and 61 a ST (keeping 4 to 8 grams of thyroid tissue - mean 6 g). All patients had received propylthiouracil and/or neo-mercazole and were in a euthyroid state at the time of surgery; they also took potassium iodide (lugol) for ten days before surgery. Results: There were no deaths. Transient hypocalcemia (< 3 months) occurred in 32 patients (15 TT and 17 ST) and persistent hypocalcemia in 8 having had TT. Two patients developed transient recurrent laryngeal nerve palsy after ST (< 3 months). After a median follow-up period of seven years (1-15) with five patients lost to follow-up, 41 patients having had a ST are in a hypothyroid state (73%), thirteen are euthyroid (23%), and two suffered recurrent hyperthyroidism, requiring completion of thyroidectomy. All 33 patients having had TT - with follow-ups averaging two years (0.5-8) - are receiving thyroxin substitution. Conclusions: There were no instances of persistent recurrent laryngeal nerve palsy in either group, but persistent hypoparathyroidism occurred more frequently after TT. Long after ST, hypothyroidism developed in nearly three of four cases, whereas euthyroidy was maintained in only one-fourth; recurrent hyperthyroidy was rare.


Author(s):  
Ian Neath ◽  
Jean Saint-Aubin ◽  
Tamra J. Bireta ◽  
Andrew J. Gabel ◽  
Chelsea G. Hudson ◽  
...  

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