6 research outputs found
A global look at time: a 24-country study of the equivalence of the Zimbardo Time Perspective Inventory
In this article, we assess the structural equivalence of the Zimbardo Time Perspective Inventory (ZTPI) across 26 samples from 24 countries (N = 12,200). The ZTPI is proven to be a valid and reliable index of individual differences in time perspective across five temporal categories: Past Negative, Past Positive, Present Fatalistic, Present Hedonistic, and Future. We obtained evidence for invariance of 36 items (out of 56) and also the five-factor structure of ZTPI across 23 countries. The short ZTPI scales are reliable for country-level analysis, whereas we recommend the use of the full scales for individual-level analysis. The short version of ZTPI will further promote integration of research in the time perspective domain in relation to many different psycho-social processes
Original Communication - Family based analysis of quantitative changes of erythrocyte membrane proteins in essential hypertension
Our previous studies have found significant quantitative changes in the
erythrocyte membrane proteins in essential hypertension (EH). The
purpose of the present study was to quantify genetic and environmental
contributions to quantitative variability of erythrocyte membrane
proteins in EH. We studied 115 hypertensive patients, 126 normotensive
subjects, 235 of their first-degree relatives and 24 twin pairs by
sodium dodecyl sulphate (SDS) polyacrylamide gel electrophoresis. The
decomposition of total phenotypic variance of erythrocyte membrane
proteins to genetic and environmental components was performed by the
least squares method. We found that genetic factors play a significant
role in the control of quantitative changes in erythrocyte membrane
proteins in EH. The genetic contribution to anion exchanger variation
was stronger in hypertensives (88%) than in normotensives (36%), and
was attributed exclusively to additive polygenic effects. Variation in
glucose transporter was under marked control of major gene effect
(74%). Importantly, variations in anion and glucose transporters in EH
but not in healthy controls were strongly affected by common underlying
genes with strong pleiotropic effects (r=0.921, P<0.05). These data
provide evidence to support the genetic source of quantitative changes
in membrane proteins in EH. Furthermore, the pleiotropic effects of
common underlying genes seem to be responsible for variations in the
transport proteins likely associated with genetic susceptibility to
essential hypertension
Time perspective profiles of cultures
This chapter summarises some results of the International Time Perspective Research Project, which is a collaborative cross-cultural study of time perspective carried out in 24 countries. The highlights of structural equivalence assessment study are presented, showing the cross-cultural invariance of 36 items of the Zimbardo Time Perspective Inventory (ZTPI) scale. The associations between country-level ZTPI scores and other culture-level indicators, including the Human Development Index and Hofstede cultural dimensions, are presented and discussed. Using hierarchical cluster analysis, five distinct profiles of time perspective were found (future-oriented, present-oriented, balanced, moderately fatalistic, and negative), and significant differences in the prevalence of these profiles across cultures were found. Implications and perspectives for future research are discussed
A global look at time: a 24-country study of the Equivalence of the Zimbardo Time Perspective Inventory
In this article, we assess the structural equivalence of the Zimbardo Time Perspective Inventory (ZTPI) across 26 samples from 24 countries (N = 12,200). The ZTPI is proven to be a valid and reliable index of individual differences in time perspective across five temporal categories: Past Negative, Past Positive, Present Fatalistic, Present Hedonistic, and Future. We obtained evidence for invariance of 36 items (out of 56) and also the five-factor structure of ZTPI across 23 countries. The short ZTPI scales are reliable for country-level analysis, whereas we recommend the use of the full scales for individual-level analysis. The short version of ZTPI will further promote integration of research in the time perspective domain in relation to many different psycho-social processes