A nurse is caring for a client diagnosed with schizophrenia. The client states, "Did you know that I am engaged to the Prince of England?" The nurse should document that the client is experiencing which of the following types of delusions?

Choice A rationale:

An anxiety reaction is the most appropriate explanation for the toddler's behavior of sitting quietly in the corner of the crib, sucking her thumb, and turning away from the nurse. These behaviors suggest that the toddler is experiencing anxiety due to the absence of her mother. Sucking the thumb is a common self-soothing mechanism in young children, and the behavior of turning away from the nurse can be seen as an attempt to cope with the separation.

Choice B rationale:

Resentment toward the mother is less likely in this context, as the toddler's behavior is more indicative of distress and anxiety related to separation from her mother rather than directed resentment.

Choice C rationale:

Developing autonomy is not the primary explanation for these behaviors. While developing autonomy is an important developmental milestone for toddlers, the described behavior is more suggestive of anxiety and coping with separation rather than a deliberate expression of autonomy.

Choice D rationale:

Regression refers to reverting to an earlier developmental stage in response to stress or difficulty. While regression can occur in response to hospitalization and separation from caregivers, the toddler's behavior of sitting quietly and sucking her thumb is better explained by anxiety than by regression to an earlier developmental stage.

The correct answer is choice D: Continuous worry about the undiagnosed presence of an illness.

Choice A rationale:

Sudden unexplained loss of peripheral sensation is not typically associated with illness anxiety disorder. This symptom may be indicative of a neurological condition and would require further medical evaluation to determine the cause.

Choice B rationale:

Obsession over a fictitious defect in physical appearance is more characteristic of body dysmorphic disorder, not illness anxiety disorder. Individuals with body dysmorphic disorder are preoccupied with one or more perceived defects or flaws in their physical appearance, which are not observable or appear slight to others.

Choice C rationale:

Having prior physical health followed by the need for two surgeries within the last three months does not necessarily indicate illness anxiety disorder. This choice does not provide enough context to link it to illness anxiety disorder, as it could be related to many other health conditions.

Choice D rationale:

Continuous worry about the undiagnosed presence of an illness is a key finding in illness anxiety disorder. Individuals with this disorder are excessively concerned with and preoccupied by the belief that they have, or are in danger of developing, a serious undiagnosed illness despite medical reassurance.