Original geschrieben von Krassni Kulak
Welche Psychologischen Abgründe muss ein MEnsch durchlaufen haben, um ein Wort wie "gnubbeln" zu verwenden. Alter!
!
Ich mach's dann, wenn sie mich stören und - noch viel häufiger - wenn mir langweilig is mit meinen Händen, z.b. beim Film gucken.
[5 mins später]
löl - ich wollte ja eigtl schreiben, dass es sicherlich keine psychologischen Untersuchungen zu diesem Scheiß gibt, aber ich habe mich geirrt. Habe mich gerade durch die "umfangreiche" Literatur zum nailbiting gewühlt. Es ging leider primär um die Therapieansätze. Aber ich fand auch einige Juwelen, deren Erkenntnisse ich euch nicht vorenthalten will (für die Qualität übernehme ich keine Garantie - man beachte auch das Alter der Studien -.-)
Relationship of nailbiting to sociopathy.

Walker, Betty A., U Southern California
Ziskind, Eugene
Journal of Nervous and Mental Disease, Vol 164(1), Jan 1977. pp. 64-65.
Compared the incidence of nailbiting in 62 sociopaths with that in 62 nonsociopath matched controls utilizing the Cornell Medical Index Health Questionnaire. Results indicate that the incidence of nailbiting in primary sociopaths (48%) was significantly greater than in the control group (24%). The relationship of nailbiting and anxiety in primary sociopathy is discussed.
Genetische Vererbung?
Nail-biting in twins.
Bakwin, Harry, New York U., Medical School
Developmental Medicine & Child Neurology, Vol. 13(3), Jun 1971. pp. 304-307.
To investigate a possible genetic factor in nailbiting (a familial habit), 203 same-sex 6-18 yr. Old twin children were studied by analyzing incidence in 128 monozygotic and 78 dizygotic twin children. 2/3 of monozygotic pairs were concordant for nailbiting as against 1/3 of dizygotic pairs. This was 11/2 times more frequent in girls than in boys.
LOL - Freund lässt grüßen

Probleme um Daumenlutschen und Nägelkauen.
Lang, Eugenia Pia Sr.
Heilpädagogische Werkblätter, 26, 1957. pp. 243-250.
The question is posed regarding the meaning of thumbsucking and nailbiting for the child who is afflicted with these habits and how he can be helped to overcome them. Thumbsucking may be (a) normal behavior during the preschool years, (b) a symptom of regressive tendencies in the child, or (c) a pathological addiction. The child can be freed from this habit only if we give to him that which can satisfy his innermost needs: security and love. Nailbiting also is usually a phenomenon of regression, a fixation on the self. Thumbsucking and nailbiting both represent inadequate ways of dealing with deep anxiety. The child who is thus afflicted can only be helped, not by attacking the symptom, but by being allowed to experience that his small life is supported by great love.
Jetzt wissen wir Bescheid, was Kumas Problem ist 8[
UNTERSUCHUNGEN ÜBER DAS NÄGELKNABBERN BEIM KINDE VOM KLINISCH-PSYCHOLOGISCHEN STANDPUNKT.
Schachter, M., 40 A, Boulevard Voltaire, Marseille, France.
Praxis der Kinderpsychologie und Kinderpsychiatrie, 2, 1953. pp. 173-177.
The incidence of nailbiting in children seen at a psychiatric clinic and in a "normal" group is compared. The age range of nailbiters in the clinical group was 8 to 13 years, and that of the normal group, 6 to 14 years. More boys than girls were found to be nailbiters. Other data of nailbiters, including family constellation, development, intelligence, and Rorschach findings are discussed.
+
The incidence of nailbiting among adults.
Pennington, L. A.
American Journal of Psychiatry, 102, 1945. pp. 241-244.
This study is an upward extension in age groups of Wechsler's study concerning the incidence of nail biting (see 5: 3523). The author questioned and observed 6,946 white normal recruits ranging in age from 17 to 37 years for the nail-biting mannerism. About 21.5% of the group were nail-biters. Wechsler pointed out a rapid increment in this habit from ages 3 to 15. In this study, a gradual decrement is found in the mannerism from age 16 through 37. On the basis of the evidence, the author suggests that the application of the Freudian theory of psychosexual development to these findings conceals more than it reveals. He suggests as a tentative working hypothesis that nail-biting is an unconsciously acquired tension-reducing mechanism and that better understanding of the habit can only come about through careful clinical study of the individual personalities who manifest this mannerism.
Index of nailbiting in children.
Malone, Anthony J., U. Illinois, Urbana.
The Journal of Abnormal and Social Psychology, Vol 47(2), Apr 1952. pp. 193-202.
A review of the literature led to the conclusion that nailbiting, like thumbsucking, might be (a) a normal action if indulged in occasionally and one which merits little attention by the clinician; (b) a simple tension releasing mechanism if the child is addicted to it to a mild degree; or (c) a sign of severe internal tension if the action is severe and persistent (4, 5).
daraus: DEGREE OF FINGERNAIL BITING - DESCRIPTION
•o (not bitten) - Free margin intact.
I + (mildly bitten) - Free edge of nail irregular but reasonably intact. Fingernail biting confirmed on questioning.*
2+ (moderately bitten) - Free margin of nail absent. Regular biting confirmed on questioning.
3+ (severely bitten) - Fingernail bitten beyond the free edge; nail margin below the soft tissue border (Fig. i).
Es gibt hierzu auch Bilder, aber die rauszukopieren - darauf hab ich gerade keinen Bock.
Wie ihr seht - sehr reichhaltige und ernstzunehmende Befunde. Man sollte sich Gedanken machen!?
PS: ja, mir ist gerade langweilig...