Confidence intervals for an effect size measure based on the Mann–Whitney statistic. Part 2: asymptotic methods and evaluation

Newcombe, Robert G.

doi:10.1002/sim.2324

Cited by 143 publications

(141 citation statements)

References 18 publications

Supporting

Mentioning

137

Contrasting

Order By: Relevance

“…For the comparison of abundance of specimens recorded in treated and control areas, the Mann-Whitney U test was applied (Newcombe, 2006). The software SPSS 20 and Shannon's diversity index were used (Kautz et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

The effect of hay mulching on soil temperature and the abundance and diversity of soil-dwelling arthropods in potato fields

Dudás¹,

Menyhárt²,

Gedeon³

et al. 2016

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. The average soil temperature was signifi cantly lower in plots covered with hay. Hay mulching, however, did not increase signifi cantly the total number of soil micro-arthropods collected using a soil pin trap and a soil sampler. Signifi cant increases in the number of individuals was recorded only for certain groups. 64% of all the arthropods collected using soil pin traps were collected in hay-covered plots and 36% in control plots. This increase was statistically signifi cant for the orders Entomobryomorpha and Poduromorpha of the subclass Collembola and surface-dwelling (epigeic) Coleoptera. For the samples collected using the soil sampler, 57% of the specimens were collected from hay-covered plots and 43% from control plots. As for the pin traps this was refl ected in differences in the numbers of the orders Entomobrhyomorpha and Poduromorpha of the subclass Collembola and Pauropoda, collected in the treated and control plots. We conclude that mulching affected the different arthropod groups differently.

show abstract

Section: Discussionmentioning

confidence: 99%

The effect of hay mulching on soil temperature and the abundance and diversity of soil-dwelling arthropods in potato fields

Dudás¹,

Menyhárt²,

Gedeon³

et al. 2016

Eur. J. Entomol.

View full text Add to dashboard Cite

show abstract

“…This relative effect size statistic, q, can be regarded as expressing the degree of separation between two frequency distributions. The statistic q is analogous to the standardised difference obtained for normally distributed data by dividing the difference of the means by the pooled standard deviation (37,38).…”

Section: Discussionmentioning

confidence: 99%

Long-term follow-up of prenatally treated children at risk for congenital adrenal hyperplasia: does dexamethasone cause behavioural problems?

Hirvikoski

Nordenström

Lindholm³

et al. 2008

European Journal of Endocrinology

View full text Add to dashboard Cite

Objectives: To investigate the long-term effects of prenatal treatment of congenital adrenal hyperplasia (CAH) with emphasis on behavioural problems and temperament. Design: A population-based long-term follow-up study of Swedish children at risk for virilising CAH, who had received treatment prenatally with dexamethasone (DEX). The questionnaire-based follow-up was performed when the children had reached school age. Methods: Standardised parent-completed questionnaires were used to evaluate adaptive functioning, behavioural/emotional problems and psychopathology, social anxiety and temperament in DEXexposed school-aged children (nZ26) and matched controls (nZ35). In addition, the association between parental questionnaires and children's self-ratings was investigated. Results: There were no statistically significant differences between DEX-exposed children and controls in measures of psychopathology, behavioural problems and adaptive functioning. In a questionnaire on temperamental traits, DEX-exposed children were described by their parents as being more sociable than controls (PZ0.042). The correlation analysis showed only modest parent-child agreement on social anxiety, i.e. the increased social anxiety in children's self-ratings was not confirmed by their parents. Conclusions: DEX-treated children showed good overall adjustment. The parent-child agreement with respect to social anxiety was modest, highlighting the importance of multiple information sources and assessment methods. The clinical significance of the observed difference in sociability cannot be determined within the frameworks of this study. Additional studies of larger cohorts are essential to make more decisive conclusions on the safety of the treatment. Until then, it is important that parents are thoroughly informed about the benefits and potential risks and uncertainties of this controversial treatment.

show abstract

“…Nevertheless, all the models considered can be described using the parameter p 1 = FdG = p • 1 (F, G) which is particularly meaningful in the context of the WRS test. In more detail, in Lehmann (1998) (p. 70) and Newcombe (2006) it is argued that p 1 can be viewed as the effect size in the context of the WRS test. It should also be noted that W XY is, in practice, the natural estimator of p 1 :p 1 = W XY /mn.…”

Section: Proposition 1 Under the Location Shift Model The Power Funmentioning

confidence: 99%

“…In order to obtain the lower bounds for p 1 , we adopt method 5 in Newcombe (2006), since it provides good coverage accuracies. In detail, the conservative estimatorp γ 1 is derived inverting the asymptotic distribution ofp 1 (stemming from (5) As regard the RP estimators, the following alternatives can be considered:…”

Section: Example Of Applicationmentioning

confidence: 99%

On stochastic orderings of the Wilcoxon Rank Sum test statistic—With applications to reproducibility probability estimation testing

Capitani¹,

Martini²

2011

Statistics & Probability Letters

View full text Add to dashboard Cite

Recently, the possibility of testing statistical hypotheses through the estimate of the reproducibility probability (i.e. the estimate of the power of the statistical test) in a general parametric framework has been introduced. In this paper, we provide some results on the stochastic orderings of the Wilcoxon Rank Sum (WRS) statistic, implying, for example, that the related test is strictly unbiased. Moreover, under some regularity conditions, we show that it is possible to define a continuous and strictly monotone power function of the WRS test. This last result is useful in order to obtain a point estimator and lower bounds for the power of the WRS test. In analogy with the parametric setting, we show that these power estimators, alias reproducibility probability estimators, can be used as test statistic, i.e. it is possible to refer directly to the estimate of the reproducibility probability to perform the WRS test. Some reproducibility probability estimators based on asymptotic approximations of the power are provided. A brief simulation shows a very high agreement between the approximated reproducibility probability based tests and the classical one.

show abstract

Confidence intervals for an effect size measure based on the Mann–Whitney statistic. Part 2: asymptotic methods and evaluation

Cited by 143 publications

References 18 publications

The effect of hay mulching on soil temperature and the abundance and diversity of soil-dwelling arthropods in potato fields

The effect of hay mulching on soil temperature and the abundance and diversity of soil-dwelling arthropods in potato fields

Long-term follow-up of prenatally treated children at risk for congenital adrenal hyperplasia: does dexamethasone cause behavioural problems?

On stochastic orderings of the Wilcoxon Rank Sum test statistic—With applications to reproducibility probability estimation testing

Contact Info

Product

Resources

About