The primary goal of this observational study is to evaluate prospective memory in HIV+ patients compared to healthy subjects. The secondary goal is to examine the relationship between prospective memory and Hot Cognition (mechanical cognitive abilities) and Cold Cognition (cognitive abilities supported by emotion and social perception). The main questions it aims to answer are:

• Do HIV+ patients have more impaired prospective memory than healthy subjects?
• Is there a greater influence of Hot Cognition on prospective memory than Cold Cognition? Participants will undergo a battery of neuropsychological tests: Memory for Intentions Screening Test (MIST), Montreal Cognitive Assessment (MOCA), Interpersonal Reactivity Index and Modified Five Point Test.

Inclusion Criteria HIV+:

• consent to participate in the study
• diagnosis of HIV
• Current antiretroviral therapy
• age >18 years
• native Italian speaker

Exclusion Criteria HIV+:

• age <18 years
• presence of major psychiatric disorders within the past 6 months
• additional neurological conditions that may impair the performance of the tests (Alzheimer's disease, Outcomes of head-brain trauma, cerebrovascular episodes)
• Alcohol and drug addiction within the past 6 months
• Additional medical conditions that may impair neurocognitive profile and functional abilities (cerebrovascular damage, cardiac problems with functional impairment, severe liver disease)

Inclusion Criteria HIV- :

• consent to participate in the study
• Absence of HIV infection (HIV-RNA negative)
• age >18 years
• native speaker of Italian

Exclusion Criteria HIV+ :

• age <18 years
• presence of major psychiatric disorders within the past 6 months
• additional neurological conditions that may impair the performance of the tests (Alzheimer's disease, Outcomes of head-brain trauma, cerebrovascular episodes)
• Alcohol and drug addiction within the past 6 months
• additional medical conditions that may impair neurocognitive profile and functional abilities (cerebrovascular damage, heart problems with functional impairment, severe liver disease).

We expect the population with HIV and the healthy population compared by age (between 40 and 60 years old for the majority) and schooling (majority high school graduates). We expect a virologically suppressed HIV population with good adherence to antiretroviral therapy and deficits in prospective memory compared with the healthy population.