Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Other |
Attentional Bias |
Subjects will complete an attentional bias task. The number of inhibitory failures (i.e., commission errors) to "no-go" targets following methamphetamine-related stimuli will be used to evaluate attentional bias (range 0 - 1: greater values represent greater number of errors committed). Commission errors are when you response (i.e., press the corresponding key on a computer) when you were instructed not to respond. |
12 sessions over approximately 4.5 weeks |
|
Other |
Snaith-Hamilton-Pleasure Scale to Measure Anhedonia (Inability to Experience Pleasure) |
A 14-item Snaith-Hamilton-Pleasure Scale covers four domains of pleasure response (interest/pastimes, social interaction, sensory experience and food/drink) with higher scores representing less anhedonia. Scores range from 0 to 56 units: lower scores representing greater anhedonia. |
4 times over approximately 4.5 weeks |
|
Other |
Delay Discounting for Methamphetamine |
Subjects will complete a delay discounting task in 4 sessions following 4 days of medication maintenance. Subjects are presented a series of hypothetical choices between a smaller amount of methamphetamine offered "now" or a larger amount of methamphetamine offered a later times in the future (e.g., 4 hours, a day, 3 weeks). The discounting rate, 'k', is calculated and log10-transformed. Greater values of log-transformed 'k' correspond with greater rates of discounting (i.e., preference for smaller reinforcer provided now rather than larger, delayed reinforcers [e.g., smaller amount of methamphetamine given now as opposed to a larger amount given later]). The units for discounting rates are theoretical and not linked to a physical dimension (e.g., number of button presses) and the range is theoretically not bound (i.e., negative infinity to positive infinity). |
4 sessions over approximately 4.5 weeks |
|
Other |
Delay Discounting for Money |
Subjects will complete a delay discounting task in 4 sessions following 4 days of medication maintenance. Subjects are presented a series of hypothetical choices between a smaller sum of money offered "now" or a larger sum of money offered a later times in the future (e.g., 4 hours, a day, 3 weeks). The discounting rate, 'k', is calculated and log10-transformed. Greater values of log-transformed 'k' correspond with greater rates of discounting (i.e., preference for smaller reinforcer provided now rather than larger, delayed reinforcers [e.g., smaller sum of money given now as opposed to a larger sum given later]). The units for discounting rates are theoretical and not linked to a physical dimension (e.g., number of button presses) and the range is theoretically not bound (i.e., negative infinity to positive infinity). |
4 sessions over approximately 4.5 weeks |
|
Primary |
Reinforcing Effects of Methamphetamine Following Methylphenidate (0 mg; Placebo) Maintenance. |
Number of methamphetamine doses earned by subjects on a progressive ratio schedule of reinforcement. Subjects sample a dose of methamphetamine (0, 10, or 20 mg) and then have ten opportunities (e.g., trials) to "work" for a 1/10th of the sampled dose via clicking on a computer mouse (i.e., 10 completed trials is the full sampled dose). |
Following at least 4 days of maintenance on placebo during inpatient admission, up to 1 week |
|
Primary |
Reinforcing Effects of Methamphetamine Following Methylphenidate (20 mg) Maintenance. |
Number of methamphetamine doses earned by subjects on a progressive ratio schedule of reinforcement. Subjects sample a dose of methamphetamine (0, 10, or 20 mg) and then have the ten opportunities (e.g., trials) to "work" for a 1/10th of the sampled dose via clicking on a computer mouse (i.e., 10 completed trials is the full sampled dose). |
Following at least 4 days of maintenance on drug during inpatient admission, up to 1 week |
|
Primary |
Reinforcing Effects of Methamphetamine Following Methylphenidate (40 mg) Maintenance. |
Number of methamphetamine doses earned by subjects on a progressive ratio schedule of reinforcement. Subjects sample a dose of methamphetamine (0, 10, or 20 mg) and then have the ten opportunities (e.g., trials) to "work" for a 1/10th of the sampled dose via clicking on a computer mouse (i.e., 10 completed trials is the full sampled dose). |
Following at least 4 days of maintenance on drug during inpatient admission, up to 1 week |
|
Primary |
Reinforcing Effects of Methamphetamine Following Methylphenidate (60 mg) Maintenance. |
Number of methamphetamine doses earned by subjects on a progressive ratio schedule of reinforcement. Subjects sample a dose of methamphetamine (0, 10, or 20 mg) and then have the ten opportunities (e.g., trials) to "work" for a 1/10th of the sampled dose via clicking on a computer mouse (i.e., 10 completed trials is the full sampled dose). |
Following at least 4 days of maintenance on drug during inpatient admission, up to 1 week |
|
Secondary |
Heart Rate After Methamphetamine Administration Following Methylphenidate (0 mg) Maintenance. |
Heart Rate (beats per minute) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Heart Rate After Methamphetamine Administration Following Methylphenidate (20 mg) Maintenance. |
Heart Rate (beats per minute) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Heart Rate After Methamphetamine Administration Following Methylphenidate (40 mg) Maintenance. |
Heart Rate (beats per minute) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Heart Rate After Methamphetamine Administration Following Methylphenidate (60 mg) Maintenance. |
Heart Rate (beats per minute) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Systolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (0 mg) Maintenance. |
Systolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Systolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (20 mg) Maintenance. |
Systolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Systolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (40 mg) Maintenance. |
Systolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Systolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (60 mg) Maintenance. |
Systolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Diastolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (0 mg) Maintenance. |
Diastolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Diastolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (20 mg) Maintenance. |
Diastolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Diastolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (40 mg) Maintenance. |
Diastolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Diastolic Blood Pressure After Methamphetamine Administration Following Methylphenidate (60 mg) Maintenance. |
Diastolic blood pressure (millimeter of mercury) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Temperature After Methamphetamine Administration Following Methylphenidate (0 mg) Maintenance. |
Oral temperature (degrees fahrenheit) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Temperature After Methamphetamine Administration Following Methylphenidate (20 mg) Maintenance. |
Oral temperature (degrees fahrenheit) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Temperature After Methamphetamine Administration Following Methylphenidate (40 mg) Maintenance. |
Oral temperature (degrees fahrenheit) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Temperature After Methamphetamine Administration Following Methylphenidate (60 mg) Maintenance. |
Oral temperature (degrees fahrenheit) is recorded following administration of methamphetamine. Data are presented as mean peak effect. Peak effect means the highest rated value following administration of methamphetamine (0, 10, and 20 mg) |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (0 mg) Administration Following Methylphenidate (0 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (10 mg) Administration Following Methylphenidate (0 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (20 mg) Administration Following Methylphenidate (0 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (0 mg) Administration Following Methylphenidate (20 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (10 mg) Administration Following Methylphenidate (20 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (20 mg) Administration Following Methylphenidate (20 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (0 mg) Administration Following Methylphenidate (40 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (10 mg) Administration Following Methylphenidate (40 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (20 mg) Administration Following Methylphenidate (40 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (0 mg) Administration Following Methylphenidate (60 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (10 mg) Administration Following Methylphenidate (60 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|
Secondary |
Subjective Effects of Methamphetamine (20 mg) Administration Following Methylphenidate (60 mg) Maintenance. |
Subjective effects (i.e., mood) of methamphetamine are recorded following administration. Data are presented as mean peak effect. Peak effect means the highest rated value (0 - 100 mm) following administration of methamphetamine. |
Daily over approximately 1 week of inpatient stay. |
|