The paired t-test as a simple latent change score model

Coman, Emil; Picho, Katherine; McArdle, John J.; Villagrá, Víctor A.; Dierker, Lisa; Iordache, Eugen

doi:10.3389/fpsyg.2013.00738

Cited by 69 publications

(64 citation statements)

References 7 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The variance of the change score represents interindividual differences in intraindividual change. Overall, the use of LC models with observed scores as dependent variables is comparable to calculating t tests/ANOVAs [54,56,57]. The similarities between these approaches have been highlighted elsewhere, and the approach has been successfully applied in a recent treatment study [58].…”

Section: Methodsmentioning

confidence: 99%

Benefits of Individualized Feedback in Internet-Based Interventions for Depression: A Randomized Controlled Trial

Zagorscak

Heinrich

Sommer

et al. 2018

Psychother Psychosom

View full text Add to dashboard Cite

Background: Even though there is an increasing number of studies on the efficacy of Internet-based interventions (IBI) for depression, experimental trials on the benefits of added guidance by clinicians are scarce and inconsistent. This study compared the efficacy of semistandardized feedback provided by psychologists with fully standardized feedback in IBI. Methods: Participants with mild-to-moderate depression (n = 1,089, 66% female) from the client pool of a health insurance company participated in a cognitive-behavioral IBI targeting depression over 6 weeks. Individuals were randomized to weekly semistandardized e-mail feedback from psychologists (individual counseling; IC) or to automated, standardized feedback where a psychologist could be contacted on demand (CoD). The contents and tasks were identical across conditions. The primary outcome was depression; secondary outcomes included anxiety, rumination, and well-being. Outcomes were assessed before and after the intervention and 3, 6, and 12 months later. Changes in outcomes were evaluated using latent change score modeling. Results: Both interventions yielded large pre-post effects on depression (Beck Depression Inventory-II: d_IC = 1.53, d_CoD = 1.37; Patient Health Questionnaire-9: d_IC = 1.20, d_CoD = 1.04), as well as significant improvements of all other outcome measures. The effects remained significant after 3, 6, and 12 months. The groups differed with regard to attrition (IC: 17.3%, CoD: 25.8%, p = 0.001). Between-group effects were statistically nonsignificant across outcomes and measurement occasions. Conclusion: Adding semistandardized guidance in IBI for depression did not prove to be more effective than fully standardized feedback on primary and secondary outcomes, but it had positive effects on attrition.

show abstract

Section: Methodsmentioning

confidence: 99%

Benefits of Individualized Feedback in Internet-Based Interventions for Depression: A Randomized Controlled Trial

Zagorscak

Heinrich

Sommer

et al. 2018

Psychother Psychosom

View full text Add to dashboard Cite

show abstract

“…When the significance level was set at 0.05, there was no significant difference between the reference and predicted values in the 95% confidence intervals. In this case, the calibration model has good applicability …”

Section: Methodsmentioning

confidence: 99%

Geographic origin identification and rapid determination of four constituents of Gentiana rigescens by FTIR combined with chemometrics

Zhao

Tianjun

Zhang

et al. 2019

Journal of Chemometrics

View full text Add to dashboard Cite

Gentiana rigescens is one of the most important traditional Chinese medicines because of its therapeutic effects in protecting the liver and promoting bile discharge, anti‐hypertension, and spasm and pain relief. To enhance quality control, a comprehensive assessment of G. rigescens from different geographic origins by Fourier‐transform infrared (FTIR) in combination with chemometrics was conducted. Through pretreatment by the second derivative, spectrum standard deviation and Monte Carlo uninformative variable elimination (MC‐UVE), the characteristic FTIR spectra were selected and an identification model of the different geographic origins of G. rigescens was built by partial least squares discriminant analysis (PLS‐DA). The validation results showed that the accuracy rates of the model were 100%, 97.22%, and 100% for samples from Yunnan, Guizhou, and Sichuan, respectively. On the basis of the correlation between characteristic spectral points and the contents of swertiamarin, gentiopicroside, sweroside, and loganic acid, quantitative models were established by partial least squares regression (PLSR). The measured and predicted values were not significantly different as assessed through the paired t test (p > 0.05). Additionally, the characteristic spectra were interpreted, and 93 common peaks were selected. FTIR analysis combined with chemometric methods could accurately identify the different geographic origins of G. rigescens and rapidly predict the content of swertiamarin, gentiopicroside, sweroside, and loganic acid, thus providing a comprehensive method of evaluating traditional Chinese medicines.

show abstract

“…We choose to use a bivariate latent change score (bLCS) model as it allowed us to examine the development of neural and behavioral measures simultaneously without the constraints of measurement error 56,57 . A latent change score model can be conceptualized as a reparameterization of a paired t-test and has recently been highlighted for its usefulness in teasing apart the complex processes involved in longitudinal developmental research 58,59 . bLCS models were estimated for average cortical thickness and total surface area.…”

Section: Statistical Analysis Surface Area Cortical Thickness Hippomentioning

confidence: 99%

Cognitive and brain development is independently influenced by socioeconomic status and polygenic scores for educational attainment

Judd

Sauce

Wiedenhoeft

et al. 2019

Preprint

View full text Add to dashboard Cite

The influence of socioeconomic (SES) inequalities on brain and cognitive development is a hotly debated topic. However, previous studies have not considered that genetic factors overlap with SES. Here we showed, for the first time, that SES and EduYears-PGS (a score from thousands of genetic markers for educational attainment) have independent associations with both cognition and global cortical surface area in adolescents. EduYears-PGS also had a localized association in the brain: the intraparietal sulcus, a region related to non-verbal intelligence. In contrast, SES had global, but not regional, associations, and these persisted throughout adolescence. This suggests that the influence of SES inequalities is widespread -a result that opposes the current paradigm and can help inform policies in education.

show abstract

The paired t-test as a simple latent change score model

Cited by 69 publications

References 7 publications

Benefits of Individualized Feedback in Internet-Based Interventions for Depression: A Randomized Controlled Trial

Benefits of Individualized Feedback in Internet-Based Interventions for Depression: A Randomized Controlled Trial

Geographic origin identification and rapid determination of four constituents of Gentiana rigescens by FTIR combined with chemometrics

Cognitive and brain development is independently influenced by socioeconomic status and polygenic scores for educational attainment

Contact Info

Product

Resources

About