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PubMed1983

Saccharin hoarding by albino rats: further evidence on incentive and object retrieval.

Albino rats were allowed to retrieve dental pledgets soaked in water or pledgets soaked in 1.0% saccharin solution from wooden alleys into their home cages. Under ad lib conditions more saccharin pledgets were hoarded than water pledgets, but during water deprivation this preference was reversed. If rats were given saccharin pledgets alone, hoarding did not decline during water deprivation. Rats showed the ad lib saccharin preference although they did not hoard their normal diet of food pellets, and it was maintained in animals that had received saccharin since weaning. Hence sweetness of taste is a property of objects that can induce hoarding, and the reversal in hoarding during deprivation is due to an increased preference for water rather than a diminished saccharin preference. This indicates that incentive properties of objects are crucial to the expression of this species-typical behavior.

Animals↗

PubMed2001

Hoarding by elderly people.

Although hoarding has been studied in adults, little is known about problems of hoarding by elderly people. This study used a structured telephone interview with elder services providers to investigate hoarding behaviors in relation to functional impairment, cognitive deficits, and physical and psychological conditions in 62 elderly clients. Most elderly hoarders were female, unmarried, and lived alone. Extensive clutter was associated with significant impairment, interfering with basic hygiene, and posing a serious physical threat for many elderly clients. Clients were rarely insightful about their collecting and often resisted change, rendering interventions generally ineffective. Never-married status was associated with more severe hoarding and greater impairment and possibly with worse outcomes of intervention efforts. Health and mental health implications of hoarding by elderly people and implications for treatment are discussed.

Activities of Daily Living↗

PubMed1999

Diogenes syndrome and hoarding in the elderly: case reports.

Presented here are two case reports of elderly persons with Diogenes syndrome (variously known as senile breakdown, social breakdown and senile squalor syndrome). Diogenes syndrome is often (but not always) characterized by a tendency to hoard excessively (syllogomania). The first patient was diagnosed as having both a schizotypal personality disorder and obessive-compulsive disorders (OCD) while the second was diagnosed as having a schizoid personality disorder. Only the former demonstrated the tendency to hoard rubbish. The Diogenes syndrome in both cases can be hypothesized to be a reaction to stress in elderly people with certain personality characteristics or as the end stage of a personality disorder. The hoarding behavior that was manifested only in the first case can probably be the result of the presence of an OCD. The authors raise the possibility that OCD may be the cause of hoarding rubbish in those cases of Diogenes syndrome in which hoarding exists and cannot be explained by psychotic disorders, dementia or any other mental disorders due to a general medical condition (GMC) or substance-related disorders.

Aged↗

PubMed1998

Hoarding: a symptom, not a syndrome.

BACKGROUND: Hoarding behavior in humans spans a continuum from normal collecting to pathological self-neglect and can be associated with a variety of psychiatric disorders. METHOD: The authors summarize research in the past 15 years characterizing hoarding behavior in groups of college students, in nonclinical populations of self-named "pack rats," in outpatients treated for obsessive-compulsive disorder (OCD), and in individual pathological hoarders presented in psychiatric case reports. Two new case reports of pathological hoarding are presented here. RESULTS: The literature suggests, as do the 2 case reports presented, that certain factors may be common to all groups of hoarders, as they all show poor insight, lack of resistance to the compulsion to hoard, and poor treatment motivation. CONCLUSION: Possible biological and psychosocial determinants of pathological hoarding include association with schizophrenia, OCD, and tic disorders, as well as a possible link through the neurotransmitter dopamine. Management issues range from psychopharmacologic treatment with antipsychotic medication to behavioral therapy and environmental manipulation.

Age Factors↗

PubMed2025

Obsessive-compulsive disorder with hoarding behavior: unravelling key differences.

OBJECTIVE: Hoarding disorder remains underexplored and poorly understood despite its significant impact on individuals and communities. While historically linked to obsessive-compulsive disorder (OCD), emerging evidence suggests they may be distinct conditions. This study aims to investigate these differences. METHODS: Adults aged 18-88 years old (M = 39.86, SD = 14.86) were part of the Genomic Psychiatry Cohort study, including 1247 individuals with OCD without presumed hoarding disorder (OCD-pHD) and 663 individuals with OCD and presumed hoarding disorder (OCD+pHD). Sociodemographic data were collected, and participants were screened for other psychiatric conditions. All met DSM-5 criteria for OCD, with severity assessed using the Florida Obsessive-Compulsive Inventory and Y-BOCS. Statistical significance was set at p ≤ 0.0007, adjusted for multiple comparisons. RESULTS: The OCD+pHD group had significantly lower educational attainment, was more likely to live alone or in supervised living, and less likely to be married. This group also had more severe OCD and poorer insight. All types of obsessions and compulsions were more frequent in the OCD+pHD group, except for obsessions related to harming others. Additionally, the OCD+pHD group had higher rates of major depressive disorder, post-traumatic stress disorder, bipolar disorder, schizophrenia, body dysmorphic disorder, trichotillomania and previous diagnosis and/or symptoms of attention deficit and hyperactivity disorder. No significant difference was found for substance use and Tic/Tourette disorders. CONCLUSIONS: Significant clinical differences were observed between the groups, highlighting the need for further research to improve diagnosis, conceptualization, awareness, and support for individuals with hoarding disorder in the context of OCD.

Humans↗

PubMed2004

Actual and perceived memory deficits in individuals with compulsive hoarding.

Memory problems have been hypothesized to underlie compulsive hoarding behavior [Frost and Hartl, 1996: Behav Res Ther 34:341-350]. This study examined memory performance, memory confidence, and memory beliefs in 22 individuals with severe hoarding symptoms and 24 matched normal control subjects. Participants were administered two measures of learning and memory that required strategic planning and organization for successful performance: the Rey-Osterrieth Complex Figure Test (RCFT) and California Verbal Learning Test (CVLT). Self-reports of memory confidence, perceived consequences of forgetting, importance of remembering, and need to keep possessions in sight also were assessed. In comparison to controls, participants with compulsive hoarding recalled less information on delayed recall of the RCFT and CVLT and used less effective organizational strategies on the RCFT but not the CVLT. Hoarders also reported significantly less confidence in their memory, more catastrophic assessments of the consequences of forgetting, and a stronger desire to keep possessions in sight. Results provide initial evidence of learning and memory impairment and poor memory confidence in subjects with compulsive hoarding.

Adult↗

PubMed1982

Ontogeny of hoarding in the golden hamster: the development of motor patterns and their sequential coordination.

The hoarding behavior of 4 litters of Golden hamster pups (n = 3) was observed every 2nd day between the age of 13 and 47 days (2 litters) or 13 and 55 (2 litters). Each litter lived with the mother until Day 30; then the pups were put in social isolation. Immature forms of pouch filling and emptying, which were not integrated into coherent behavior sequences, appeared from the beginning of the observation period. Coordinated hoarding trips were shown from Day 21 onwards, once the motor patterns of inserting and extracting food had gained their definitive form. The development of hoarding was correlated with the animal's body weight and therefore with maturational factors. Mature hoarding behavior was greatly enhanced by the subject's separation from its family unit.

Age Factors↗

PubMed1998

High population density in bank voles stimulates food hoarding after breeding.

The effects of conspecific density (i.e. risk of intraspecific competition) on hoarding behaviour were studied in breeding pairs of bank voles, Clethrionomys glareolus. I simulated high population density by using odours of conspecifics, to exclude the direct effects of exploitation or interference competition for food. The pairs of bank voles hoarded only at the end of their breeding season. Hoarding was not correlated with whether the voles had a litter during the experiment or their litter size, but was more likely at the high population density and for pairs with small females. This may indicate that smaller females especially make caches in the autumn, possibly to ensure better winter survival under high population density. I discuss the hoarding behaviour of bank voles in relation to their territorial behaviour and food resources during the breeding season and predictable population changes during winter. Copyright 1998 The Association for the Study of Animal Behaviour. Copyright 1998 The Association for the Study of Animal Behaviour.

Journal Article↗

PubMed1996

Ponderostat: hoarding behavior satisfies the condition for a lipostat in the rat.

The mass of food hoarded by rats given access to food only two hours per day is proportional to the rats' body weight deficit. The present work investigated whether this behavior might reflect the amount of body fat rather than body weight. The hoarding behavior of three rats was measured every other day at various body weights. After each hoarding session the animals were anesthetized and their percentage of fat was measured in vivo with a total body electrical conductivity method (TOBEC). The results showed that the amount of food hoarded in the two-hour sessions was inversely proportional to the fat content of the body. This result shows that, in the rat, the fat stored is correlated with the behavioral response leading to the defence of body weight, and therefore satisfies a condition necessary for a lipostat.

Adipose Tissue↗

PubMed1998

Hoarding behavior in obese and control rats: evidence indicating cost differences.

Hoarding behavior of rats can be described by the equation y = ax + b, where y is the amount of food hoarded, x the rat's body weight, a the negative slope of the regression line, and b, the ordinate at zero abscissa. We repeatedly evaluated the parameters of this equation in six obese Zucker rats and six controls, from 8 to 32 weeks of age. The mean slope of the regression lines remained close to -11 in both groups of rats, until 24 weeks of age. From then on, the slopes of the obese rats decreased dramatically to c. -3, and remained as such for the rest of the experiment, while that of controls remained constant. At this age (24 weeks), controls weighed 453 +/- 14 g and obese rats 729 +/- 18 g. We suggest that the decreased slope of hoarding in obese rats was due to an increased cost of the hoarding behavior.

Animals↗

PubMed1984

Effect of naltrexone on food intake and hoarding in white-footed mice (Peromyscus).

Increases in food consumption and hoarding in mammals have been shown to be immediate and preparative adjustments to the energetic stresses of temperate winters. The sensitivity of these behaviors to the opiate antagonist naltrexone was tested in non-deprived white-footed mice (Peromyscus leucopus). Mice received naltrexone hydrochloride intraperitoneally (10 mg/kg in saline vehicle) once daily for four consecutive days subsequent to an equivalent period of injection with saline as control. Daily food intake was significantly (p less than 0.05) lower after naltrexone treatment. Hoarding, as assessed by logarithmic hoarding scores and the weight of cached food, was not affected by administration of this drug at this dosage. These results suggest that hoarding, a complex behavioral pattern that does not immediately affect internal energy stores, may not fall within the opiate regulatory scheme.

Animals↗

PubMed1988

Inhibition of feeding and hoarding behaviors by phenylpropanolamine in the adult rat.

The mechanism by which phenylpropanolamine (PPA) reduces feeding and body lipid is unknown. To determine if malaise associated with PPA treatment mediates its anorexic action, the present study compared the actions of PPA on feeding and hoarding behavior with that of lithium chloride at dose levels that induce comparable conditioned taste aversions. Adult male rats were injected (IP) 30 minutes prior to a test of feeding and hoarding behavior with either 0.9% saline, 32 mg/kg lithium chloride or with 10 mg/kg, 20 mg/kg or 40 mg/kg PPA. Although 32 mg/kg lithium chloride was without effect on either feeding or hoarding behaviors, PPA significantly suppressed both behaviors. These results do not support the notion that malaise is a critical aspect of the anorexic property of PPA and that hoarding behavior may represent a sensitive index of anorexic drug potency.

Animals↗

PubMed1993

The hoarding habit, countertransference, and consultation anthropology in a Peruvian psychiatric hospital.

The 'hoarding habit' is the practice of collecting a large number of mostly useless objects by psychiatric patients. Countertransference consists of distorted perceptions by psychotherapists in their study of individuals, or social scientists in their study of human groups, which interfere with the pursuit of their therapeutic or research goals. A case is here presented from observations made by the author in one pavilion of the Hospital Victor Larco Herrera in Lima, Peru, of a 'bag man' who persisted in carrying his 'hoard' with him in large market bags. The practice of hoarding is related to the culture and social structure of the hospital, patients' use of physical space, the existence of trade networks, the smuggling of alcohol, and patients' needs to retain a feeling of selfness and personal autonomy as well as to maintain ties with the external world. In all these senses the hoarding habit is overdetermined: it is both a symptom of pathology and a sign of healthy functioning. However, its clinical construction may be expanded by an observer who can function as a 'culture broker' and who may be able to apply the dialectic of pathology and health to the operation of psychiatric services for more therapeutic ends. However, the observer, in a consultation capacity, is advised to go beyond the study of transference and countertransference in his or her subjects to focus on his/her own countertransference in order to consult more effectively.

Anthropology, Cultural↗

PubMed1988

Disruption of food hoarding by injections of procaine into mediodorsal thalamus, GABA into subpallidal region and haloperidol into accumbens.

The contributions of accumbens-subpallido-mediodorsal thalamus (MD) projections to food hoarding were investigated. The number of food pellets hoarded was reduced by bilateral injections of haloperidol into the accumbens, by bilateral injections of GABA into the subpallidal region and by bilateral injections of procaine into the mediodorsal thalamus. Food hoarding was not reduced by bilateral injections of procaine into the pedunculopontine nucleus. It appears that subpallido-mediodorsal thalamus projections are associated with hoarding behavior but not subpallido-pedunculopontine projections.

Animals↗

PubMed2006

Cognitive aspects of nonclinical obsessive-compulsive hoarding.

Research on the cognitive variables associated with obsessive-compulsive hoarding is scarce. In this study, we investigated cognitive variables that may contribute to the maintenance and possibly etiology of hoarding. College students who characterized themselves as either "packrats" (nonclinical hoarders; n=21) or not (control participants; n=20) completed questionnaires assessing hoarding behavior and beliefs about hoarding, and completed a task requiring them to categorize diverse objects and trinkets of minimal value into groups. The results revealed that nonclinical hoarders, relative to control participants, rated the categorization task as significantly more stressful and difficult. Relative to control participants, hoarders took longer to complete the task and sorted objects into more categories. These findings suggest that underinclusiveness and indecisiveness, characteristic of clinical hoarders, are evident in nonclinical hoarders as well.

Adult↗

PubMed1999

Cognitive-behavioral treatment of compulsive hoarding: a multiple baseline experimental case study.

The present case study describes a cognitive-behavioral intervention directed at helping a 53 year old female suffering from compulsive hoarding decrease clutter and improve decision-making and sorting techniques. The intervention focused on decision-making training, exposure and response prevention, and cognitive restructuring. Ratios of cluttered space to overall space were calculated for floor and furniture tops for each of five rooms over a period of 17 months. Clutter decreased substantially in each of the rooms targeted for intervention, while clutter ratios remained stable for a room used as a baseline control (no intervention). In addition, D.'s scores on self-report measures of obsessive-compulsive symptomatology decreased after 9 months of intervention suggesting that the treatment protocol affected symptoms of hoarding distress, as well as clutter. Despite previously reported difficulties in the treatment of compulsive hoarding, our results provide preliminary evidence that a cognitive-behavioral intervention can be successful in reducing hoarding symptoms. Suggestions for future research include streamlining the treatment program and testing its efficacy on large clinical samples.

Cognitive Behavioral Therapy↗

PubMed2005

[A study of persons living in neglect, filth and squalor or who have a tendency to hoard].

PURPOSE: Who develops neglect, lives in filth and squalor or tends to hoard? What happens to people with such tendencies, after heaving been discovered by community mental health services? MATERIALS AND METHODS: During a two-year observation period it was attempted to study all such persons in the city of Halle/Saale. Life history as well as medical, social and psychiatric variables were assessed. After a mean period of 11 months these persons were re-assessed. RESULTS: 35 persons who lived in squalor and filth or in a neglected condition or who were known to hoard were assessed (60 % male, mean age: 63 years). 17 persons (49 %) suffered from an organic brain disease, 14 (40 %) fulfilled criteria of psychotic illness (mainly schizophrenia). In 9 cases a comorbid physical disorder contributed to the prevailing living conditions. After 11 months, for 21 persons (60 %) no amelioration of neglect, squalor or hoarding was observed, which was especially true for persons suffering from a psychotic illness. The results yielded some evidence that interventions, which aimed at living conditions (such as moving to sheltered accommodation), had positive effects, while this was not true for standard mental health care within community services and hospital treatment. CONCLUSION: Neglect, living in squalor and hoarding are frequently symptoms of an underlying psychiatric or somatic illness. In this respect the results suggest that "standard care" proved to be of limited effect -- especially for subjects with a psychotic illness.

Adult↗

PubMed2002

Genomewide scan of hoarding in sib pairs in which both sibs have Gilles de la Tourette syndrome.

A genome scan of the hoarding phenotype (a component of obsessive-compulsive disorder) was conducted on 77 sib pairs collected by the Tourette Syndrome Association International Consortium for Genetics (TSAICG). All sib pairs were concordant for a diagnosis of Gilles de la Tourette syndrome (GTS). However, the analyses reported here were conducted for hoarding as both a dichotomous trait and a quantitative trait. Not all sib pairs in the sample were concordant for hoarding. Standard linkage analyses were performed using GENEHUNTER and Haseman-Elston methods. In addition, novel analyses with a recursive-partitioning technique were employed. Significant allele sharing was observed for both the dichotomous and the quantitative hoarding phenotypes for markers at 4q34-35 (P=.0007), by use of GENEHUNTER, and at 5q35.2-35.3 (P=.000002) and 17q25 (P=.00002), by use of the revisited Haseman-Elston method. The 4q site is in proximity to D4S1625, which was identified by the TSAICG as a region linked to the GTS phenotype. The recursive-partitioning technique examined multiple markers simultaneously. Results suggest joint effects of specific loci on 5q and 4q, with an overall P value of.000003. Although P values were not adjusted for multiple comparison, nearly all were much smaller than the customary significance level of.0001 for genomewide scans.

Alleles↗