Families assigned to the control condition will be provided with a website with information corresponding to milestones of toddler development. Control families will be asked to review that week's materials before the each of the 9 weekly coach calls. The active control condition serves three important purposes: 1) Maintains an active line of communication and accurate contact records for Post-test 1 and Post-test 2 session scheduling; 2) Masks participant's awareness of intervention vs. control assignment; and 3) Approximates communication with intervention staff such that results showing ePALS effects are attributable to intervention rather than regular communication with an interventionist.

In this task the child will interact with their parent in a "free play" task for 10 minutes with a set of standardized toys, and the interaction will be videotaped. Parents are asked to play with their children in "typical ways" with a few constraints (e.g., television must be off). Behavior will be coded and assigned a score of how of 1-5 which indicates how often the assessed behavior occurs: 5 (Almost Always); 4 (greater than half the time); 3 (half the time); 2 (less than half the time); 1 (None of the time).

In this task the child will interact with their parent in a "free play" task for 10 minutes with a set of standardized toys, and the interaction will be videotaped. Parents are asked to play with their children in "typical ways" with a few constraints (e.g., television must be off). Behavior will be coded and assigned a score of how of 1-5 which indicates how often the assessed behavior occurs: 5 (Almost Always); 4 (greater than half the time); 3 (half the time); 2 (less than half the time); 1 (None of the time).

In this task the child will interact with their parent in a "free play" task for 10 minutes with a set of standardized toys, and the interaction will be videotaped. Parents are asked to play with their children in "typical ways" with a few constraints (e.g., television must be off). Behavior will be coded and assigned a score of how of 1-5 which indicates how often the assessed behavior occurs: 5 (Almost Always); 4 (greater than half the time); 3 (half the time); 2 (less than half the time); 1 (None of the time).

In this task the child will interact with their parent in a "free play" task for 10 minutes with a set of standardized toys, and the interaction will be videotaped. Parents are asked to play with their children in "typical ways" with a few constraints (e.g., television must be off). Behavior will be coded and assigned a score of how of 1-5 which indicates how often the assessed behavior occurs: 5 (Almost Always); 4 (greater than half the time); 3 (half the time); 2 (less than half the time); 1 (None of the time).

In this task the child will interact with their parent in a "free play" task for 10 minutes with a set of standardized toys, and the interaction will be videotaped. Parents are asked to play with their children in "typical ways" with a few constraints (e.g., television must be off). Behavior will be coded and assigned a score of how of 1-5 which indicates how often the assessed behavior occurs: 5 (Almost Always); 4 (greater than half the time); 3 (half the time); 2 (less than half the time); 1 (None of the time).

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Behavior is coded and scored.A score of 1 to 5 will be assigned to indicate how often the behavior occurred, as follows: 1 = 0 reaches; 2 = 1 - 2 reaches that are 15sec. sustained; 3 = 3 reaches that are 30sec. sustained; 4 = 4 Individually scored reaches that are 45sec. sustained; 5 = 5 or more reaches that are 60sec.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Behavior is coded and scored. A score of 1 to 5 will be assigned to indicate how often the behavior occurred, as follows: 1 = did not happen; 2 = 1 brief instance -15 sec. sustained; 3 = 2 - 3 times -30 sec. sustained; 4 = ¾ instances - 45 sec. sustained; 5 = spends most of minute - >45 sec.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Behavior is coded and scored. A score of 1 to 5 will be assigned to indicate how often the behavior occurred, as follows: 1 = 0 sec.; 2 = 15 sec. sustained; 3 = 30 sec sustained; 4 = 45 sec sustained; 5 = 60 sec sustained

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Behavior is coded and scored.A score of 1 to 5 will be assigned to indicate how often the behavior occurred, as follows: 1 = did not happen; 2 = 1 brief instance; 3 = 2/3 times w/ sustaining behavior; 4 = 3/4 times w/ sustained behavior; 5 = spends most of minute trying to get parent attention in appropriate way

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes.Behavior is coded and scored A score of 1 to 5 will be assigned to indicate how often the behavior occurred, as follows: 1 = did not happen; 2 = 1 occurrence; 3 = 2/3 occurrences; 4 = 4 occurrences; 5 = 5 or more occurrences

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Number of times parent exhibits the behavior will be reported.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Number of times parent exhibits the behavior will be reported.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Number of times parent exhibits the behavior will be reported.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Number of times parent exhibits the behavior will be reported.

This task measures child frustration and parenting behaviors related to child's frustration. During this assessment the assessor provides the parent paperwork to complete and places an elaborately wrapped gift on the table in front of the child. The parent is instructed to have the child wait to open the gift until the assessor returns to the room and then the parent and child are left alone in a room for 8 minutes. Number of times parent exhibits the behavior will be reported.

This task measures child skill related to problem solving through goal-directed play. For this task, the child is videotaped while playing alone with five sequentially presented toys, each presented for 2mins. The video will be subsequently coded by dividing the play session into 10 second intervals. Level of the child's play is coded based on a hierarchical level-of-play scale ranging from 1 (off task) to 13 (goal-directed play with mastery).

This task measures child working memory. During the task, children are asked to search 3-, then 6-, then 9- box arrays for hidden rewards. Children are asked to search individual boxes in the array one at a time and to keep track of the boxes that were previously searched. Between each search attempt, the boxes are covered which requires children to remember which boxes were previously searched. The task begins with a 3-box array where children are given 10 trials to find three rewards. Children who complete the 3-box array will move on to a 6-box array where they will have 20 trials to locate six rewards. Children will only progress to the nine-box array (max. 30 trials) if the six-box array is completed in 14 trials or less. Score is reported as the number of rewards found divided by the number of total reaches.

In this assessment, children are seated across a table from an assessor and are told that they will receive a present but that the present must be wrapped. The experimenter asks that the child turns their back and does not peek while she wraps the present because seeing it ruins the surprise. While the child is turned away, the experimenter noisily wraps for 1 minute. After this portion is complete, the experimenter tells the child that she forgot to put a bow on the gift, and asks the child to wait and not touch the box until she returns with a bow. The experimenter leaves for 2 minutes. Child's self-restraint is scored from 0-3 where 0 = no peeking, 1=Child looks over shoulder to peek, 2=child turns body in seat to peek, and 3 = child left her seat.

In this assessment, children are seated across a table from an assessor and are told that they will receive a present but that the present must be wrapped. The experimenter asks that the child turns their back and does not peek while she wraps the present because seeing it ruins the surprise. While the child is turned away, the experimenter noisily wraps for 1 minute. After this portion is complete, the experimenter tells the child that she forgot to put a bow on the gift, and asks the child to wait and not touch the box until she returns with a bow. The experimenter leaves for 2 minutes. Child's self-restraint is scored from 0-4 where 0 = no touching, 1 = child touches box, 2 = Child opens the box so that the lid is less than 2 inches from base; looks and then replaces lid, 3 = Child opens the box or child completely removes lid from box, and 4 = child removes the toy from the box or child touches the toy while it remains in the box.

In this assessment, children are seated across a table from an assessor and are told that they will receive a present but that the present must be wrapped. The experimenter asks that the child turns their back and does not peek while she wraps the present because seeing it ruins the surprise. While the child is turned away, the experimenter noisily wraps for 1 minute. After this portion is complete, the experimenter tells the child that she forgot to put a bow on the gift, and asks the child to wait and not touch the box until she returns with a bow. The experimenter leaves for 2 minutes. Child's distraction is scored from 0-5 where 1 = no active actions, 2 = a little bit of time, 3 = Some of the time, 4 = a lot of the time, 5 = most of the time.

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Noncompliance is scored from 1-6, and a higher score indicates greater non-compliance behaviors.

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Anger is scored form 1-6, with a higher score indicating greater anger behaviors.

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Anger/frustration behaviors specifically directed to parent is scored from 1-7, with a higher score indicating greater anger/frustration behaviors, .

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Coping is scored 1-5, with a higher score indicating greater coping behaviors.

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Enthusiasm is scored from 1-6, with a higher score indicating greater child enthusiasm for task.

The parent and child complete two problem solving tasks that are graded in difficulty. The assessor explains the problem to the parent and gives the tool and apparatus to the child. The parent is instructed to allow the child to solve the problem independently, but provide as much help as they believe the child needs. Task 1 is the "tube task", in which the child has to insert a stick inside a tube to get a toy. Task 2 is the "clear box task" that requires the child to place a toy brick on a lever, which raises the lever to the top of the box, in which a toy becomes available. Only children who pass task 1 will go on to task 2. Persistence related to attention is scored from 1-5, with a higher score indicating greater child persistence behaviors related to attention.

The MacArthur-Bates Communicative Development Inventories (MB-CDIs) are scored from 0 to 100 percentile, with a higher percentile indicating better language ability.

Children will complete a looking task in which fearful, happy, neutral, and control faces are presented individually on a screen. After the looking task, the child will complete an overlap task with the same stimuli. First, child's attention will be directed to the center of the screen with an 'attention-getter'. After attention is fixated for 1 second, a face appears centered on the screen. After 1 second, a distractor image appears in the periphery either to the right or left and remains on the screen for 3 seconds.

Children will complete a looking task in which fearful, happy, neutral, and control faces are presented individually on a screen. After the looking task, the child will complete an overlap task with the same stimuli. First, child's attention will be directed to the center of the screen with an 'attention-getter'. After attention is fixated for 1 second, a face appears centered on the screen. After 1 second, a distractor image appears in the periphery either to the right or left and remains on the screen for 3 seconds.

Children will complete a looking task in which fearful, happy, neutral, and control faces are presented individually on a screen. After the looking task, the child will complete an overlap task with the same stimuli. First, child's attention will be directed to the center of the screen with an 'attention-getter'. After attention is fixated for 1 second, a face appears centered on the screen. After 1 second, a distractor image appears in the periphery either to the right or left and remains on the screen for 3 seconds.

Anisotropy values range from 0 to 1, and a higher value indicates greater white matter structural integrity.

Anisotropy values range from 0 to 1, and a higher value indicates greater white matter structural integrity.

Anisotropy values range from 0 to 1, and a higher value indicates greater white matter structural integrity.

Anisotropy values range from 0 to 1, and a higher value indicates greater white matter structural integrity.

Following application of EEG caps and electrodes, resting EEG will be collected for 5 minute while an experimenter blows bubbles.

For ERP assessment, children view emotional faces in a passive viewing paradigm on a computer screen while EEG is performed.

For ERP assessment, children view emotional faces in a passive viewing paradigm on a computer screen while EEG is performed.

This survey will measure family exposure to potentially traumatic aspects of COVID-19 and assesses the impact of the pandemic on the family. Parents will complete the survey. The Exposure Score ranges from 0 to 25, with a higher score indicating greater exposure.

This survey will measure family exposure to potentially traumatic aspects of COVID-19 and assesses the impact of the pandemic on the family. Parents will complete the survey. The Impact Score ranges from 12 to 60, with a higher score indicating greater impact.