Which personality disorder is associated with a lack of emotional response and pleasure?

Schizoid personality disorder is characterized by a pervasive pattern of detachment from social relationships and a restricted range of emotional expression in interpersonal settings. Individuals with this disorder often appear aloof and are typically indifferent to both praise and criticism from others. They often prefer solitary activities and have little interest in forming close relationships, which contributes to their lack of emotional responses and diminished pleasure from social interactions and activities that typically bring joy to others.

In contrast, other personality disorders listed have different features. Histrionic personality disorder involves a pattern of excessive emotionality and attention-seeking behavior, which is markedly different from the emotional detachment seen in schizoid personality disorder. Dissocial personality disorder, also known as antisocial personality disorder, is characterized by a disregard for the rights and feelings of others, which can be associated with impulsivity and irresponsibility, rather than a lack of emotional response. Anankastic personality disorder, or obsessive-compulsive personality disorder, is focused on orderliness, perfectionism, and control, and does not primarily involve a deficiency in emotional response or pleasure.

Thus, the defining traits of schizoid personality disorder align closely with the characteristics mentioned in the question regarding emotional response and pleasure.