Best Practices in the Analysis of Variance

Howell, David

doi:10.4135/9781412995627.d28

Cited by 10 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When appropriate, comparisons among treatment groups, delays and cue conditions and among treatment groups at each time point were performed using contrast tests. Because mixed-model analysis holds even with missing data as long as the missing data occur completely at random, no imputation/deletion was applied (Overall and Tonidandel, 2007;Howell, 2008); data were missing for only one subject (E group) at one time point (9 months) due to an acute illness. Differences were considered statistically significant at p Ͻ 0.05.…”

Section: Methodsmentioning

confidence: 99%

Effect of Ovarian Hormone Therapy on Cognition in the Aged Female Rhesus Macaque

et al. 2016

View full text Add to dashboard Cite

Studies of the effect of hormone therapy on cognitive function in menopausal women have been equivocal, in part due to differences in the type and timing of hormone treatment. Here we cognitively tested aged female rhesus macaques on (1) the delayed response task of spatial working memory, (2) a visuospatial attention task that measured spatially and temporally cued reaction times, and (3) a simple reaction time task as a control for motor speed. After task acquisition, animals were ovariectomized (OVX). Their performance was compared with intact controls for 2 months, at which time no group differences were found. The OVX animals were then assigned to treatment with either a subcutaneous sham implant (OVX), 17-␤ estradiol (E) implant (OVXϩE) or E implant plus cyclic oral progesterone (OVXϩEP). All groups were then tested repeatedly over 12 months. The OVXϩE animals performed significantly better on the delayed response task than all of the other groups for much of the 12 month testing period. The OVXϩEP animals also showed improved performance in the delayed response task, but only at 30 s delays and with performance levels below that of OVXϩE animals. The OVXϩE animals also performed significantly better in the visuospatial attention task, particularly in the most challenging invalid cue condition; this difference also was maintained across the 12 month testing period. Simple reaction time was not affected by hormonal manipulation. These data demonstrate that chronic, continuous administration of E can exert multiple beneficial cognitive effects in aged, OVX rhesus macaque females.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of Ovarian Hormone Therapy on Cognition in the Aged Female Rhesus Macaque

et al. 2016

View full text Add to dashboard Cite

show abstract

“…a Results of a repeated measures analysis of variance: Differences between types of training needs for all types of counselors combined were statistically significant with a small effect, F (8.48, 7719.77) = 16.45, p < .004, η 2 = .02 b For all but the descriptive statistics variable, this is univariate F (df within , df between ) = (2, 863). For the descriptive statistics variable, the homogeneity of variance assumption was violated, so Welch's F (2, 268.72) was used as per Howell (). c Tukey post hoc comparisons.…”

Section: Resultsmentioning

confidence: 99%

Research Training Needs of Scientist‐Practitioners: Implications for Counselor Education

Peterson

Hall

Buser

2016

Couns Edu & Supervision

View full text Add to dashboard Cite

show abstract

“…For the second research question, one-way ANOVA was used to test the null hypothesis that there was no performance difference among the customized underwires with different lengths. Scheffe's post hoc tests were followed for further analysis, together with power analysis, and a .05 significance level of confidence was adopted for hypothesis testing (Howell, 2008). SPSS Statistics 24 and GPower 3.1 software packages were used.…”

Section: Discussionmentioning

confidence: 99%

Bra Underwire Customization With 3-D Printing

Wang

Suh

2019

Clothing and Textiles Research Journal

View full text Add to dashboard Cite

In the current research, we aimed to investigate whether customized 3-D underwires improve bra performance. The first experiment was designed to study whether customized 3-D printed underwires provide significant benefits over conventional wires. Customized 3-D underwires were produced following individual breast root shapes and compared with conventional underwires through wear trials. According to the empirical data, pressure was significantly reduced with the customized underwire, and performance improvement was more evident with wearing sensations of support and comfort. In the second experiment, we varied the length of the customized underwires and observed how the length of underwires influenced bra performance. More pressure was found in the outer region of the longest underwires than the medium-length wires but support and comfort sensations did not have noticeable changes depending on the wire length. As illustrated in this research, advanced 3-D technologies could contribute to product engineering and customization in the apparel industry.

show abstract

Best Practices in the Analysis of Variance

Cited by 10 publications

References 0 publications

Effect of Ovarian Hormone Therapy on Cognition in the Aged Female Rhesus Macaque

Effect of Ovarian Hormone Therapy on Cognition in the Aged Female Rhesus Macaque

Research Training Needs of Scientist‐Practitioners: Implications for Counselor Education

Bra Underwire Customization With 3-D Printing

Contact Info

Product

Resources

About