We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Individual and Environment: Monozygotic Twins Reared Apart

Winifred F. Storey, MD
JAMA. 1980;244(19):2211-2212. doi:10.1001/jama.1980.03310190061032.
Text Size: A A A
Published online


Beginning in 1954, the author studied 12 pairs of monozygotic twins, aged 22 to 77 years, who had been "reared apart since early childhood." The clinical research extended over a two- to four-year interval for each twin pair. The methods included indepth serial medical and psychiatric interviews, EEGs, ECGs, chest films, Wechsler-Bellevue intelligence measurements, and personality profiles as interpreted from the Rorschach test. To assist in confirming zygosity, blood groups were documented.

The current publication is a revised edition of the original, published in 1965, with a follow-up of the twins 25 years after the initiation of the investigation.

The results are discussed in four categories: health in general, physical illnesses, level of intelligence and personality profile, and presence or absence of mental illness.

Among the similarities between the twins of each pair are EEGs, level of functioning intelligence, and presence or absence of migraine headache. However, personality profiles showed


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.