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True and false recall and dissociation among maltreated children: The role of self-schema

Published online by Cambridge University Press:  23 January 2008

Kristin Valentino*
Affiliation:
University of Rochester
Dante Cicchetti*
Affiliation:
University of Rochester University of Minnesota
Fred A. Rogosch
Affiliation:
University of Rochester
Sheree L. Toth
Affiliation:
University of Rochester
*
Address correspondence and reprint requests to: Kristin Valentino, Yale Child Study Center, 230 South Frontage Road, New Haven, CT 06520; E-mail: kristin.valentino@yale.edu
Dante Cicchetti, Institute of Child Development, University of Minnesota, 51 East River Road, Minneapolis, MN 55455.

Abstract

The current investigation addresses the manner through which trauma affects basic memory and self-system processes. True and false recall for self-referent stimuli were assessed in conjunction with dissociative symptomatology among abused (N = 76), neglected (N = 92), and nonmaltreated (N = 116) school-aged children. Abused, neglected, and nonmaltreated children did not differ in the level of processing self-schema effect or in the occurrence and frequency of false recall. Rather, differences in the affective valence of false recall emerged as a function of maltreatment subtype and age. Regarding dissociation, the abused children displayed higher levels of dissociative symptomatology than did the nonmaltreated children. Although abused, neglected, and nonmaltreated children did not exhibit differences in the valence of their self-schemas, positive and negative self-schemas were related to self-integration differently among the subgroups of maltreatment. Negative self-schemas were associated with increased dissociation among the abused children, whereas positive self-schemas were related to increased dissociation for the neglected children. Thus, positive self-schemas displayed by the younger neglected children were related to higher dissociation, suggestive of defensive self-processing. Implications for clinical intervention are underscored.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2008

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Footnotes

This research was supported by grants from the Office of Child Abuse and Neglect to Dante Cicchetti, and the Spunk Fund, Inc. to Dante Cicchetti and Sheree Toth. The authors thank Carol Ann Dubovsky for her invaluable assistance with this project.

References

Achenbach, T. M. (1991). Manual for the Child Behavior Checklist—Teacher's report form. Burlington, VT: University of Vermont.Google Scholar
American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorder(4th ed.). Washington, DC: American Psychiatric Association.Google Scholar
Ayoub, C. C., O'Connor, E., Rappolt-Schlichtmann, G., Fischer, K. W., Rogosch, F. A., Toth, S. L., et al. (2006). Cognitive and emotional differences in young maltreated children: A translational application of dynamic skills theory. Development and Psychopathology, 18, 679706.Google Scholar
Baldwin, D. A. (1992). Clarifying the role of shape in children's taxonomic assumption. Journal of Experimental Child Psychology, 54, 392416.Google Scholar
Barnett, D., Ganiban, J., & Cicchetti, D. (1999). Maltreatment, negative expressivity, and the development of Type D attachments from 12- to 24-months of age. Monographs of the Society for Research in Child Development, 64, 97118.CrossRefGoogle ScholarPubMed
Barnett, D., Manly, J. T., & Cicchetti, D. (1993). Defining child maltreatment: The interface between policy and research. In Cicchetti, D. & Toth, S. L. (Eds.), Child abuse, child development, and social policy pp. (773). Norwood, NJ: Ablex.Google Scholar
Beeghly, M., & Cicchetti, D. (1994). Child maltreatment, attachment, and the self system: Emergence of an internal state lexicon in toddlers at high social risk. Development and Psychopathology, 6, 530.CrossRefGoogle Scholar
Beers, S. R., & DeBellis, M. D. (2002). Neuropsychological function in children with maltreatment-related posttraumatic stress disorder. American Journal of Psychiatry, 159, 483486.Google Scholar
Black, M., Dubowitz, H., & Harrington, D. (1994). Sexual abuse: Developmental differences in children's behavior and self perception. Child Abuse & Neglect, 18, 8595.CrossRefGoogle ScholarPubMed
Bolger, K. E., Patterson, C. J., & Kupersmidt, J. B. (1998). Peer relationships and self-esteem among children who have been maltreated. Child Development, 69, 11711197.Google ScholarPubMed
Bower, G. H., & Sivers, H. (1998). Cognitive impact of traumatic events. Development and Psychopathology, 10, 625654.CrossRefGoogle ScholarPubMed
Bowlby, J. (1969). Attachment. New York: Basic Books.Google Scholar
Bremner, J. D., & Narayan, M. (1998). The effects of stress on memory and the hippocampus throughout the life cycle: Implications for childhood development and aging. Development and Psychopathology, 10, 871885.CrossRefGoogle ScholarPubMed
Bretherton, I. (1985). Attachment theory: Retrospect and prospect. Monographs of the Society for Research in Child Development, 50, 335.CrossRefGoogle Scholar
Bretherton, I. (1991). Pouring new wine into old bottles: The social self as internal working model. In Gunnar, M. & Sroufe, L. A. (Eds.), Minnesota Symposium on Child Psychology: Self-processes and development(Vol. 2, pp. 141). Hillsdale, NJ: Erlbaum.Google Scholar
Bugental, D., Blue, J., Cortez, V., Fleck, K., & Rodriguez, A. (1992). Influences of witnessed affect on information processing in children. Child Development, 63, 774786.Google Scholar
Calverley, R. M., Fischer, K. W., & Ayoub, C. (1994). Complex splitting of self-representations in sexually abused adolescent girls. Development and Psychopathology, 6, 195213.Google Scholar
Carlson, V., Cicchetti, D., Barnett, D., & Braunwald, K. (1989). Disorganized/disoriented attachment relationships in maltreated infants. Developmental Psychology, 25, 525531.CrossRefGoogle Scholar
Carlson, E. B., Furby, L., Armstrong, J., & Shales, J. (1997). A conceptual framework for the long-term psychological effects of severe and chronic childhood abuse. Child Maltreatment, 2, 272295.Google Scholar
Cicchetti, D. (1991). Fractures in the crystal: Developmental psychopathology and the emergence of the self. Developmental Review, 11, 271287.CrossRefGoogle Scholar
Cicchetti, D., & Barnett, D. (1991). Toward the development of a scientific nosology of child maltreatment. In Grove, W. & Cicchetti, D. (Eds.), Thinking clearly about psychology: Essays in honor of Paul E. Meehl: Personality and psychopathology (Vol. 2, pp. 346377). Minneapolis, MN: University of Minnesota Press.Google Scholar
Cicchetti, D., & Manly, J. T. (1990). A personal perspective on conducting research with maltreating families: Problems and solutions. In Brody, G. & Sigel, I. (Eds.), Methods of family research: Families at risk (Vol. 2, pp. 87133). Hillsdale, NJ: Erlbaum.Google Scholar
Cicchetti, D., & Rogosch, F. A. (1997). The role of self-organization in the promotion of resilience in maltreated children. Development and Psychopathology, 9, 799817.Google Scholar
Cicchetti, D., Rogosch, F. A., Maughan, A., Toth, S. L., & Bruce, J. (2003). False belief understanding in maltreated children. Development and Psychopathology, 15, 10671091.Google Scholar
Cicchetti, D., Toth, S. L., & Manly, J. T. (2002). Maternal Maltreatment Classification Interview. Unpublished manuscript.Google Scholar
Cordon, I. M., Pipe, M., Sayfan, L., Melinder, A., & Goodman, G. S. (2004). Memory for traumatic experiences in early childhood. Developmental Review, 24, 101132.CrossRefGoogle Scholar
Craik, F. L. M., & Lockhart, R. S. (1972). Levels of processing—Framework for memory research. Journal of Verbal Learning and Verbal Behavior, 11, 671684.CrossRefGoogle Scholar
Craik, F. L. M., & Tulving, E. (1975). Depth of processing and the retention of words in episodic memory. Journal of Experimental Psychology, General, 104, 268294.CrossRefGoogle Scholar
Crick, N. R., & Zahn-Waxler, C. (2003). The development of psychopathology in females and males: Current progress and future challenges. Development and Psychopathology, 15, 719742.CrossRefGoogle ScholarPubMed
Crittenden, P. M., & DiLalla, D. (1988). Compulsive compliance: The development of an inhibitory coping strategy in infancy. Journal of Abnormal Child Psychology, 16, 585599.Google Scholar
Dancu, C. V., Riggs, D. S., Hearst-Ikeda, D., Shoyer, B. G., & Foa, E. B. (1996). Dissociative experiences and posttraumatic stress disorder among female victims of criminal assault and rape. Journal of Traumatic Stress, 9, 253267.CrossRefGoogle ScholarPubMed
DeBellis, M. D., Keshavan, M. S., Casey, B. J., Clark, D. B., Giedd, J., Boring, A. M., et al. (1999). Developmental traumatology: Biological stress systems and brain development in maltreated children with PTSD. Part II: The relationship between characteristics of trauma and psychiatric symptoms and adverse brain development in maltreated children and adolescents with PTSD. Biological Psychiatry, 45, 12711284.Google Scholar
deDecker, A., Hermans, D., Raes, F., & Eelen, P. (2003). Autobiographical memory specificity and trauma in inpatient adolescents. Journal of Clinical Child and Adolescent Psychology, 32, 2231.Google Scholar
Deese, J. (1959). On the prediction of the occurrence of certain verbal intrusions in free recall. Journal of Experimental Psychology, 58, 1722.CrossRefGoogle Scholar
Dubowitz, H., Pitts, S. C., Litrownik, A. J., Cox, C. E., Runyan, D. K., & Black, M. M. (2005). Defining child neglect based on Child Protective Services data. Child Abuse & Neglect, 29, 493511.CrossRefGoogle ScholarPubMed
Egeland, B., Sroufe, L. A., & Erickson, M. F. (1983). Developmental consequence of different patterns of maltreatment. Child Abuse & Neglect, 7, 459469.Google Scholar
Eisen, M. L., Qin, J., Goodman, G. S., & Davis, S. L. (2002). Memory and suggestibility in maltreated children: Age, stress arousal, dissociation and psychopathology. Journal of Experimental Child Psychology, 83, 167212.CrossRefGoogle ScholarPubMed
English, D. E., Bangdiwala, S. I., & Runyan, D. K. (2005). The dimensions of child maltreatment: Introduction. Child Abuse & Neglect, 29, 441460.CrossRefGoogle Scholar
Fiske, S. T., & Taylor, S. E. (1991). Social cognition. New York: McGraw–Hill.Google Scholar
Foa, E. B., & Riggs, D. S. (1994). Post-traumatic stress disorder and rape. In Pynoos, R. S. (Ed.), Post-traumatic stress disorder: A clinical review (pp. 207224). Baltimore, MD: Plenum Press.Google Scholar
Goodman, G. S. (2005). Wailing babies in her wake. American Psychologist, 872881.Google Scholar
Goodman, G. S., Bottoms, B. L., Rudy, L., Davis, S. L., & Schwartz-Kenny, B. M. (2001). Effects of past abuse experiences on children's eyewitness memory. Law and Human Behavior, 25, 269298.CrossRefGoogle ScholarPubMed
Goodman, G. S., & Quas, J. A. (1997). Trauma and memory: Individual differences in children's recounting of a stressful experience. In Stein, N. L., Ornstein, A., Tversky, B., & Brainerd, C. J. (Eds.), Memory for everyday and emotional events (pp. 267294). Mahwah, NJ: Erlbaum.Google Scholar
Greenhoot, A. F., McCloskey, L., & Glisky, E. (2005). A longitudinal study of adolescents' recollections of family violence. Applied Cognitive Psychology, 19, 719743.Google Scholar
Greenwald, A. G., & Banaji, M. (1989). The self as a memory system: Powerful but ordinary. Journal of Personality and Social Psychology, 57, 4154.Google Scholar
Hammen, C., & Zupan, B. (1984). Self-schemas, depression, and the processing of personal information in children. Journal of Experimental Child Psychology, 37, 598608.Google Scholar
Harter, S. (1998). The development of self-representations. In Damon, W. & Eisenberg, N. (Eds.), Handbook of child psychology: Social, emotional, and personality development (5th ed., Vol. 4, pp. 553617). New York: Wiley.Google Scholar
Harter, S. (2006). Self-processes and developmental psychopathology. In Cicchetti, D. & Cohen, D. (Eds.), Developmental psychopathology(2nd ed., Vol. 3). New York: Wiley.Google Scholar
Henderson, D., Hargreaves, I., Gregory, S., & Williams, J. M. G. (2002). Autobiographical memory and emotion in a nonclinical sample of women with and without a reported history of childhood sexual abuse. British Journal of Clinical Psychology, 41, 129141.CrossRefGoogle Scholar
Hollingshead, A. (1975). Four-Factor Index of Social Status. Unpublished manuscript, Yale University.Google Scholar
Howe, M. L. (1998). Individual differences in factors that modulate storage and retrieval of traumatic memories. Development and Psychopathology, 10, 681698.Google Scholar
Howe, M. L. (2000). The fate of early memories: Developmental science and the retention of childhood experiences. Washington, DC: American Psychological Association.Google Scholar
Howe, M. L., Cicchetti, D., Toth, S. L., & Cerrito, B. M. (2004). True and false memories in maltreated children. Child Development, 75, 14021417.Google Scholar
Howe, M. L., & Courage, M. L. (1997). The emergence and early development of autobiographical memory. Psychological Review, 104, 499523.Google Scholar
Howe, M. L., Courage, M. L., & Edison, S. (2003). When autobiographical memory begins. Developmental Review, 23, 471494.Google Scholar
Howe, M. L., Courage, M. L., & Peterson, C. (1994). How can I remember when “I” wasn't there: Long-term retention of traumatic experiences and the emergence of the cognitive self. Consciousness and Cognition, 3, 327355.CrossRefGoogle Scholar
Howe, M. L., Courage, M. L., & Peterson, C. (1995). Intrusions in preschooler's recall of traumatic childhood events. Psychonomic Bulletin & Review, 2, 130134.Google Scholar
Howe, M. L., Toth, S. L., & Cicchetti, D. (2006). Memory and developmental psychopathology. In Cicchetti, D. & Cohen, D. (Eds.), Developmental psychopathology: Developmental neuroscience(2nd ed., Vol. 2, pp. 629655). New York: Wiley.Google Scholar
Hyman, I. E., & Billings, F. G. (1998). Individual differences and the creation of false memories. Memory, 6, 120.Google Scholar
Johnson, R. J., Greenhoot, A., Glisky, E., & McCloskey, L. (2005). The relations among abuse, depression and adolescents' autobiographical memory. Journal of Clinical Child and Adolescent Psychology, 34, 235247.Google Scholar
Kihlstrom, J. F. (2005). Dissociative disorders. In Nolen-Hoeksema, S., Cannon, T, & Widiger, T. (Eds.), Annual review of clinical psychology (Vol. 1, pp. 227253). Palo Alto, CA: Annual Reviews.Google Scholar
Kim, J. E., & Cicchetti, D. (2003). Social self-efficacy and behavior problems in maltreated and nonmaltreated children. Journal of Clinical Child and Adolescent Psychology, 32, 106117.Google Scholar
Koenig, A. L., Cicchetti, D., & Rogosch, F. A. (2000). Child compliance/noncompliance and maternal contributors to internalization in maltreating and nonmaltreating dyads. Child Development, 71, 10181032.Google Scholar
Liotti, G. (1992). Disorganized/disoriented attachment in the etiology of the dissociative disorders. Dissociation: Progress in the Dissociative Disorders, 5, 196204.Google Scholar
Liotti, G. (1999). Disorganization of attachment as a model for understanding dissociative psychopathology. In Solomon, J. & George, C. (Eds.), Attachment disorganization (pp. 291317). London: Guilford Press.Google Scholar
Lyons-Ruth, K., Repacholi, B., McLeod, S., & Silva, E. (1991). Disorganized attachment behavior in infancy: Short-term stability, maternal and infant correlates, and risk-related subtypes. Development and Psychopathology, 3, 377396.CrossRefGoogle Scholar
Macfie, J., Cicchetti, D., & Toth, S. L. (2001a). The development of dissociation in maltreated preschool-aged children. Development and Psychopathology, 13, 233254.Google Scholar
Macfie, J., Cicchetti, D., & Toth, S. L. (2001b). Dissociation in maltreated versus nonmaltreated preschool-aged children. Child Abuse & Neglect, 25, 12531267.Google Scholar
Main, M., & Hesse, P. (1990). Parents' unresolved traumatic experiences are related to infant disorganized attachment status: Is frightened and/or frightening parent behavior the linking mechanism? In Greenberg, M., Cicchetti, D., & Cummings, E. M. (Eds.), Attachment in the preschool years (pp. 161182). Chicago: University of Chicago Press.Google Scholar
Manly, J. T. (2005). Advances in research definitions of child maltreatment. Child Abuse & Neglect, 29, 425439.Google Scholar
Manly, J. T., Cicchetti, D., & Barnett, D. (1994). The impact of subtype, frequency, chronicity, and severity of child maltreatment on social competence and behavior problems. Development and Psychopathology, 6, 121143.Google Scholar
Manly, J. T., Kim, J. E., Rogosch, F. A., & Cicchetti, D. (2001). Dimensions of child maltreatment and children's adjustment: Contributions of developmental timing and subtype. Development and Psychopathology, 13, 759782.Google Scholar
Markus, H. (1977). Self-schemas and processing information about the self. Journal of Personality and Social Psychology, 35, 6378.Google Scholar
Marmar, C. R., Weiss, D. S., Metzler, T., & Delucchi, K. (1996). characteristics of emergency services personnel related to peritraumatic dissociation during critical incident exposure. American Journal of Psychiatry, 153(Suppl.), 94102.Google ScholarPubMed
Masten, A. S., Best, K., & Garmezy, N. (1990). Resilience and development: Contributions from the study of children who overcome adversity. Development and Psychopathology, 2, 425444.CrossRefGoogle Scholar
McNally, R. J. (1998). Experimental approaches to cognitive abnormality in posttraumatic stress disorder. Clinical Psychology Review, 18, 971982.CrossRefGoogle ScholarPubMed
McNally, R. J., Lasko, N. B., Macklin, M. L., & Pitman, R. K. (1995). Autobiographical memory disturbance in combat-related posttraumatic stress disorder. Behavior Research and Therapy, 33, 619630.Google Scholar
Merchelbach, H., Muris, P., Horselenberg, R., & Stougie, S. (2000). Dissociation, reality monitoring, and response bias. Journal of Personality and Individual Differences, 28, 4958.Google Scholar
Merchelbach, H., Muris, P., Rassin, E., & Horselenberg, R. (2000). Dissociative experiences and interrogative suggestibility in college students. Journal of Personality and Individual Differences, 29, 11331140.Google Scholar
Nelson, K., & Fivush, R. (2004). The emergence of autobiographical memory: A social cultural developmental theory. Psychological Review, 111, 486511.CrossRefGoogle ScholarPubMed
Ogawa, J. R., Sroufe, L. A., Weinfield, N. S., Carlson, E. A., & Egeland, B. (1997). Development and the fragmented self: A longitudinal study of dissociative symptomatology in a normative sample. Development and Psychopathology, 9, 855879.Google Scholar
Piaget, J. (1962). Play, dreams, and imitation in childhood. New York: Norton.Google Scholar
Porter, C., Lawson, J. S., & Bigler, E. D. (2005). Neurobehavioral sequelae of child sexual abuse. Child Neuropsychology, 11, 203220.CrossRefGoogle ScholarPubMed
Post, R. M., Weiss, S. R. B., Li, H., Smith, M. A., Zhang, L. X., Xing, G., et al. (1998). Neural plasticity and emotional memory. Development and Psychopathology, 10, 829855.Google Scholar
Putnam, F. (1997). Dissociation in children and adolescents: A developmental perspective. New York: Guilford Press.Google Scholar
Putnam, F., Helmers, K., & Trickett, P. K. (1993). Development, reliability, and validity of a child dissociation scale. Child Abuse & Neglect, 17, 731741.Google Scholar
Putnam, F., Hornstein, N., & Peterson, G. (1996). Clinical phenomenology of child and adolescent dissociative disorders—Gender and age effects. Child and Adolescent Psychiatric Clinics of North America, 5, 351.Google Scholar
Putnam, F. W. (1995). Development of dissociative disorders. In Cicchetti, D. & Cohen, D. (Eds.), Developmental psychopathology: Risk, disorder, and adaptation (Vol. 2, pp. 581608). New York: Wiley.Google Scholar
Putnam, F. W. (2000). Dissociative disorders. In Sameroff, A., Lewis, M., & Miller, S. (Eds.), Handbook of developmental psychopathology(Vol. 771, pp. 708715). New York: Kluwer Academic/Plenum Press.Google Scholar
Rieder, C., & Cicchetti, D. (1989). Organizational perspective on cognitive control functioning and cognitive-affective balance in maltreated children. Developmental Psychology, 25, 382393.Google Scholar
Roediger, H. L., & McDermott, K. B. (1995). Creating false memories: Remembering words not presented on lists. Journal of Experimental Psychology: Learning, Memory, and Cognition, 21, 803814.Google Scholar
Rogers, T. B. (1981). A model of the self as an aspect of the human information processing system. In Cantor, J. & Kihlstrom, N. (Eds.), Personality, cognition and social interaction. Hillsdale, NJ: Erlbaum.Google Scholar
Rogers, T. B., Kuiper, N. A., & Kirker, N. A. (1977). Self-reference and the encoding of personal information. Journal of Personality and Social Psychology, 35, 677688.Google Scholar
Rogosch, F. A., & Cicchetti, D. (2004). Child maltreatment and emergent personality organization: Perspectives from the Five-Factor model. Journal of Abnormal Child Psychology, 32, 123145.Google Scholar
Rogosch, F. A., & Cicchetti, D. (2005). Child maltreatment, attention networks, and potential precursors to borderline personality disorder. Development and Psychopathology, 17, 10711089.Google Scholar
Rudolph, K. D., Hammen, C., & Burge, D. (1995). Cognitive representations of self, family, and peers in school-age children: Links with social competence and sociometric status. Child Development, 66, 13851402.Google Scholar
Sapolsky, R. M. (1992). Stress, the aging brain, and the mechanisms of neuron death. Cambridge, MA: MIT Press.Google Scholar
Sayfan, L., Mitchell, E., Goodman, G. S., Eisen, M. L., Qin, J., & Davis, S. L. (2002). Children's emotional reaction when they disclose abuse. Unpublished manuscript.Google Scholar
Schneider-Rosen, K., & Cicchetti, D. (1991). Early self-knowledge and emotional development: Visual self-recognition and affective reactions to mirror self-image in maltreated and nonmaltreated toddlers. Developmental Psychology, 27, 481488.Google Scholar
Shields, A., & Cicchetti, D. (1998). Reactive aggression among maltreated children: The contributions of attention and emotion dysregulation. Journal of Clinical Child Psychology, 27, 381395.Google Scholar
Shields, A., & Cicchetti, D. (2001). Parental maltreatment and emotion dysregulation as risk factors for bullying and victimization in middle childhood. Journal of Clinical Child Psychology, 30, 349363.Google Scholar
Smetana, J. G., Toth, S. L., Cicchetti, D., Bruce, J., Kane, P., & Daddis, C. (1999). Maltreated and nonmaltreated preschoolers' conceptions of hypothetical and actual moral transgressions. Developmental Psychology, 35, 269281.Google Scholar
Toth, S. L., & Cicchetti, D. (1998). Remembering, forgetting, and the effects of trauma on memory: A developmental psychopathology perspective. Development and Psychopathology, 10, 589605.Google Scholar
Toth, S. L., Cicchetti, D., Macfie, J., & Emde, R. N. (1997). Representations of self and other in the narratives of neglected, physically abused, and sexually abused preschoolers. Development and Psychopathology, 9, 781796.Google Scholar
Toth, S. L., Cicchetti, D., Macfie, J., Maughan, A., & Vanmeenen, K. (2000). Narrative representations of caregivers and self in maltreated preschoolers. Attachment and Human Development, 2, 271305.Google Scholar
Toth, S. L., Manly, J. T., & Cicchetti, D. (1992). Child maltreatment and vulnerability to depression. Development and Psychopathology, 4, 97112.CrossRefGoogle Scholar
Valentino, K., Cicchetti, D., Toth, S. L., & Rogosch, F. A. (2006). Mother–child play and emerging social behaviors among infants from maltreating families. Developmental Psychology, 42, 474485.CrossRefGoogle ScholarPubMed
Vondra, J., Barnett, D., & Cicchetti, D. (1989). Perceived and actual competence among maltreated and comparison school children. Development and Psychopathology, 1, 237255.Google Scholar