111,136 research outputs found
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Signicant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.early childhood intervention; compromised randomization; social experiment; multiple-hypothesis testing
[Letter from Louis C. Perry to T. N. Carswell - April 12, 1923]
No full textA letter written to T. N. Carswell, from Louis C. Perry, dated April 12, 1924. Perry advises Carswell regarding the travel arrangements and accomodations for the Paris Convention and informally supports Green's candidacy
[Letter from Louis C. Perry to T. N. Carswell - April 19, 1924]
No full textA letter written to Mr. T. N. Carswell, Abilene, Texas, from Louis C. Perry, District Governor Lions International dated April 19, 1924. Perry expresses his devotion to Lionism with respect to politics
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence from the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.social experiment, compromised randomization, early childhood intervention, multiple-hypothesis testing
[Letter from Louis C. Perry to T. N. Carswell - April 22, 1924]
No full textA letter written to Mr. T. N. Carswell, Abilene, Texas, from Louis C. Perry, District Governor Lions International, dated April 22, 1924. Perry comments regarding the letter from Carswell to Lion Higgins assuring of his highest admiration for Carswell's present position and courage
Letter from W. T. Johnson to George Perry, Director, Farm Program WFMY
No full textLetter from W. T. Johnson to George Perry, Director, Farm Program WFMY, concerning TV program
[Letter from Louis C. Perry to T. N. Carswell - January 19, 1924]
No full textA letter written to Mr. T. N. Carswell, Abilene, Texas, from Louis C. Perry, District Governor Lions International, dated January 19, 1924. Perry expresses his appreciation for the support of the Abilene Club and promotes his idea for sub-dividing Texas into four Districts creating four District Governors in order to reduce the burden on one District Governor thus enabling Lionism in Texas to grow and serve
Analyzing social experiments as implemented: evidence from the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study. Download appendix
Perry, E T, 935296
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/410428Surname: PERRY. Given Name(s) or Initials: E T. Military Service Number or Last Known Location: 935296. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 363.226144
Item: [2016.0049.42697] "Perry, E T, 935296
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