A Study to Compare Disease Progression and Modification Following Treatment With Paliperidone Palmitate Long-Acting Injection or Oral Antipsychotics in Participant's With Recent-onset Schizophrenia or Schizophreniform

Inclusion Criteria:

   - Participant must have a current diagnosis of schizophrenia (295.90) or
   schizophreniform disorder (295.40) as defined by Diagnostic and Statistical Manual of
   Mental Disorders, 5th edition (DSM-5) and confirmed by the Structured Clinical
   Interview for DSM-5 Disorders (SCID) with a first psychotic episode within the last 24
   months prior to the screening visit

   - Participant requires treatment with an antipsychotic medication

   - Participant must sign an informed consent form (ICF) indicating that he or she
   understands the purpose of and procedures required for the study and are willing to
   participate in the study

   - Participant must have available a designated individual (example, family member,
   significant other, friend) who has knowledge of the participant and is generally aware
   of the participants daily activities, and who agrees to let the study site personnel
   know of changes in the participants circumstances when the participant is not able to
   provide this information. The designated individual must sign an informed consent form

   - Participant is anticipated to have a stable place of residence for the duration of the
   trial

Exclusion Criteria:

   - Participant has a current DSM-5 diagnosis of dissociative disorder, bipolar disorder,
   major depressive disorder, schizoaffective disorder, autistic disorder, or
   intellectual disabilities

   - Participant meets the DSM-5 definition of moderate or severe substance use disorder
   (except for nicotine) within 2 months prior to Screening

   - Participant has a history of neuroleptic malignant syndrome

   - Participant has received long-acting injectable (LAI) medication within 2 injection
   cycles prior to the Screening visit

   - Participant has mental retardation, defined as pre-morbid intelligence quotient (IQ)
   as measured by Wechsler Test of Adult Reading at Screening less than (<) 70