Participants will receive Treatment Z in qualification period 1, followed by Treatment X in qualification period 2, and then Treatment Y in qualification period 3 on Day 1 during qualification phase. Each treatment will be separated by washout of at least 3 days.

Participants will receive Treatment X in qualification period 1, followed by Treatment Y in qualification period 2, and then Treatment Z in qualification period 3 on Day 1 during each qualification phase. Each treatment will be separated by washout of at least 3 days.

Participants will receive a single oral dose of placebo (Treatment A) in treatment period 1, followed by single oral dose of suvorexant (Treatment B) in treatment period 2, single oral Dose 3 of seltorexant (Treatment F) in treatment period 3, single oral dose of zolpidem (Treatment C) in treatment period 4, single oral Dose 2 of seltorexant (Treatment E) in treatment period 5 and then a single oral Dose 1 of seltorexant (Treatment D) in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Participants will receive Treatment B in treatment period 1, followed by Treatment C in treatment period 2, Treatment A in treatment period 3, Treatment D in treatment period 4, Treatment F in treatment period 5 and then Treatment E in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Participants will receive Treatment C in treatment period 1, followed by Treatment D in treatment period 2, Treatment B in treatment period 3, Treatment E in treatment period 4, Treatment A in treatment period 5 and then Treatment F in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Participants will receive Treatment D in treatment period 1, followed by Treatment E in treatment period 2, Treatment C in treatment period 3, Treatment F in treatment period 4, Treatment B in treatment period 5 and then Treatment A in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Participants will receive Treatment E in treatment period 1, followed by Treatment F in treatment period 2, Treatment D in treatment period 3, Treatment A in treatment period 4, Treatment C in treatment period 5 and then Treatment B in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Participants will receive Treatment F in treatment period 1, followed by Treatment A in treatment period 2, Treatment E in treatment period 3, Treatment B in treatment period 4, Treatment D in treatment period 5 and Treatment C in treatment period 6 on Day 1 during each treatment phase. Each treatment will be separated by washout of at least 5 days.

Zolpidem will be administered orally as per assigned treatment sequence.

Seltorexant will be administered orally as per assigned treatment sequence.

Placebo will be administered orally as per assigned treatment sequence.

Subjective drug value will be reported. The subjective drug value is a proxy measure of reinforcing efficacy that involves a series of independent, theoretical forced choices between drug administered and different monetary values.

High VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 millimeter (mm) unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 = definitely so).

TEmax is defined as time to peak effect for drug liking (at this moment). Drug liking VAS is a bipolar scale designed to assess a participant's liking for a given study intervention at the time the question is being asked (that is, at this moment). It is scored as an integer ranging from 0 (strong disliking) to 100 (strong liking).

Emin is defined as minimum effect for drug liking (at this moment). Drug liking VAS is a bipolar scale designed to assess a participant's liking for a given study intervention at the time the question is being asked (that is, at this moment). It is scored as an integer ranging from 0 (strong disliking) to 100 (strong liking).

TEmin is defined as time to minimum effect for drug liking (at this moment). Drug liking VAS is a bipolar scale designed to assess a participant's liking for a given study intervention at the time the question is being asked (that is, at this moment). It is scored as an integer ranging from 0 (strong disliking) to 100 (strong liking).

TA_AUE is defined as time-averaged area under the effects curve for drug liking (at this moment). Drug liking VAS is a bipolar scale designed to assess a participant's liking for a given study intervention at the time the question is being asked (that is, at this moment). It is scored as an integer ranging from 0 (strong disliking) to 100 (strong liking).

TEmax of high VAS will be reported. High VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 = definitely so).

TA_AUE of high VAS will be reported. High VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 = definitely so).

Emax of good effect VAS will be reported. Good drug effects VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so).

TEmax of good effects VAS will be reported. Good drug effects VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so).

TA_AUE of good effects VAS will be reported. Good drug effects VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so).

Emax of bad effects VAS will be reported. Bad effects VAS measures the negative effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

TA_AUE for bad effects VAS will be reported. Bad effects VAS measures the negative effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

TEmax of bad effects VAS will be reported. Bad effects VAS measures the negative effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

Emin of Drowsiness/Alertness VAS will be reported. Alertness/Drowsiness VAS measures the sedative effects. It is scored using a 100 mm bipolar VAS anchored in the center with a neutral anchor of 'neither drowsy nor alert' (score of 50 mm), on the left with 'very drowsy' (score of 0 mm) and on the right with 'very alert' (score of 100 mm).

TEmin of Drowsiness/Alertness VAS will be reported. Alertness/Drowsiness VAS measures the sedative effects. It is scored using a 100 mm bipolar VAS anchored in the center with a neutral anchor of 'neither drowsy nor alert' (score of 50 mm), on the left with 'very drowsy' (score of 0 mm) and on the right with 'very alert' (score of 100 mm).

TA_AOE is defined as time-averaged area over the effect time curve. Alertness/Drowsiness VAS measures the sedative effects. It is scored using a 100 mm bipolar VAS anchored in the center with a neutral anchor of 'neither drowsy nor alert' (score of 50 mm), on the left with 'very drowsy' (score of 0 mm) and on the right with 'very alert' (score of 100 mm).

Emin of relaxation/agitation VAS will be reported. Agitation/Relaxation VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

TEmin of relaxation/agitation VAS will be reported. Agitation/Relaxation VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

TA_AOE of relaxation/agitation VAS will be reported. Agitation/Relaxation VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

TEmax of dizziness VAS will be reported. Dizziness VAS assesses the effect of dizziness by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

Emax of dizziness VAS will be reported. Dizziness VAS assesses the effect of dizziness by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

TA_AUE of dizziness VAS will be reported. Dizziness VAS assesses the effect of dizziness by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm).

Emax of any effects VAS will be reported. Any drug effects VAS measures other subjective effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

TEmax of any effects VAS will be reported. Any drug effects VAS measures other subjective effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

TA_AUE of any effects VAS will be reported. Any drug effects VAS measures other subjective effects experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (0 mm = 'definitely not') to 'extremely' (100 mm = 'definitely so').

Drug similarity VAS will be reported. The Drug Similarity unipolar VAS items provide an estimate of the drug class with which drug users identify the test drug. It is a unipolar scale ranging from 0 (not at all similar) to 100 points ( very similar).

An AE is any untoward medical occurrence in a clinical study participant administered a pharmaceutical (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the intervention.

An SAE is defined as any untoward medical occurrence that: results in death, is life-threatening, requires in patient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, leads to a congenital anomaly/birth defect in the offspring of a participant, or is an important medical event.

Percentage of participants with abnormalities in clinical laboratory parameters (included hematology, clinical chemistry, and routine urinalysis) will be reported.

Percentage of participants with abnormalities in vital signs (included temperature, pulse/heart rate, blood pressure [diastolic and systolic]) will be reported.

Emin of MOAA/S of composite and sum score will be reported. The MOAA/S is an observer-rated measure of alertness/sedation that is used widely in clinical research. The MOAA/S scores range from 5 (not sedated) to 0 (unarousable). The observer's assessment of alertness/sedation scale (OAA/S) was developed to measure the level of alertness in participants who are sedated. The OAA/S is a reliable validated measure and was shown to be sensitive to different levels of sedation and is composed of 4 assessment categories that include responsiveness, speech, facial expression, and eyes. The MOAA/S includes only the Responsiveness assessment category.

TA_AOE of MOAA/S of composite and sum score will be reported. The MOAA/S is an observer-rated measure of alertness/sedation that is used widely in clinical research. The MOAA/S scores range from 5 (not sedated) to 0 (unarousable). The observer's assessment of alertness/sedation scale (OAA/S) was developed to measure the level of alertness in participants who are sedated. The OAA/S is a reliable validated measure and was shown to be sensitive to different levels of sedation and is composed of 4 assessment categories that include responsiveness, speech, facial expression, and eyes. The MOAA/S includes only the Responsiveness assessment category.