Featured Research

from universities, journals, and other organizations

Is The Inability To Express Emotions Hereditary?

Date:
November 19, 2007
Source:
Psychotherapy and Psychosomatics
Summary:
The inability to express emotions (alexithymia) is thought to be hereditary. While the results of this twins study suggested a moderate influence of shared environmental factors, the results are in concordance with the general finding that environmental influences on most psychological traits are primarily of the nonshared rather than the shared type.

The inability to express emotions (alexithymia) is thought to be hereditary. The largest study so far has provided new data in the current issue of Psychotherapy and Psychosomatics.

The role of genetic and environmental factors for developing alexithymia is still unclear, and the aim of this study was to examine these factors in a large population-based sample of twins.

The Toronto Alexithymia Scale-20 (TAS-20) was included in a mail survey of 46,418 individuals born between 1931 and 1982 and registered with the Danish Twin Registry. The response rate was 75.3%. A total of 8,785 twin pairs, where both cotwins had completed all items of the TAS-20, were selected for this study.

Analyses were conducted for total TAS-20 scores and the subscales of

(1) difficulties in identifying feelings,

(2) difficulties in describing feelings, and

(3) externally oriented thinking.

The phenotypes were analyzed both as categorical and continuous data. All measures of similarity suggested that genetic factors added to all facets of alexithymia.

Structural equation modeling of the noncategorical data, an ACE model including additive genetic, shared environmental and nonshared environmental effects, provided the best fit for all three facets of alexithymia as well as total alexithymia scores, with heritabilities of 30-33% and the remaining variance being explained by shared (12-20%) and nonshared environmental effects (50-56%).

The results from this large population-based sample suggest that genetic factors have a noticeable and similar impact on all facets of alexithymia. While the results suggested a moderate influence of shared environmental factors, our results are in concordance with the general finding that environmental influences on most psychological traits are primarily of the nonshared rather than the shared type.

Journal reference: Jψrgensen, M.M. ; Zachariae, R. ; Skytthe, A. ; Kyvik, K. Genetic and Environmental Factors in Alexithymia: A Population-Based Study of 8,785 Danish Twin Pairs Psychother Psychosom 2007;76:369-375


Story Source:

The above story is based on materials provided by Psychotherapy and Psychosomatics. Note: Materials may be edited for content and length.


Cite This Page:

Psychotherapy and Psychosomatics. "Is The Inability To Express Emotions Hereditary?." ScienceDaily. ScienceDaily, 19 November 2007. <www.sciencedaily.com/releases/2007/11/071117114401.htm>.
Psychotherapy and Psychosomatics. (2007, November 19). Is The Inability To Express Emotions Hereditary?. ScienceDaily. Retrieved August 30, 2014 from www.sciencedaily.com/releases/2007/11/071117114401.htm
Psychotherapy and Psychosomatics. "Is The Inability To Express Emotions Hereditary?." ScienceDaily. www.sciencedaily.com/releases/2007/11/071117114401.htm (accessed August 30, 2014).

Share This




More Mind & Brain News

Saturday, August 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Young Entrepreneurs Get $100,000, If They Quit School

Young Entrepreneurs Get $100,000, If They Quit School

AFP (Aug. 29, 2014) — Twenty college-age students are getting 100,000 dollars from a Silicon Valley leader and a chance to live in San Francisco in order to work on the start-up project of their dreams, but they have to quit school first. Duration: 02:20 Video provided by AFP
Powered by NewsLook.com
Baby Babbling Might Lead To Faster Language Development

Baby Babbling Might Lead To Faster Language Development

Newsy (Aug. 29, 2014) — A new study suggests babies develop language skills more quickly if their parents imitate the babies' sounds and expressions and talk to them often. Video provided by Newsy
Powered by NewsLook.com
Electrical Stimulation Boosts Brain Function, Study Says

Electrical Stimulation Boosts Brain Function, Study Says

Newsy (Aug. 29, 2014) — Researchers found an improvement in memory and learning function in subjects who received electric pulses to their brains. Video provided by Newsy
Powered by NewsLook.com
Treadmill 'trips' May Reduce Falls for Elderly

Treadmill 'trips' May Reduce Falls for Elderly

AP (Aug. 28, 2014) — Scientists are tripping the elderly on purpose in a Chicago lab in an effort to better prevent seniors from falling and injuring themselves in real life. (Aug.28) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins