All LENA Online users can access the Performance Report for the organizations and/or groups they have permission to view. Child names do not appear on the report. Group names are masked on the printed report accessed by a user without "view child name" permission.

Parent change

What's being measured?

• Adult Words are words spoken by adults to and near the child.
• Conversational Turns are pairs of back and forth interactions between the child and an adult.

The N shows the number of children whose LENA Days are included in the graph, based on the rules for inclusion that you set in the Configuration section at the bottom of the screen.

The purple bar shows the average* for all first valid, non-hidden LENA Days that meet your filter criteria. This is the baseline, pre-LENA measure.

The green "Grad" bar shows the average* for the last two LENA Days (valid, not hidden, and meeting your filter criteria) for the same set of children. This may represent mid-point data or post-LENA data, depending on your filter criteria.  

Snapshots

What's being measured?

• The LENA Snapshot is a 52-item parent questionnaire to assess language development in children 2 months to 36 months of age. The Snapshot can be administered monthly.

The N shows the number of children represented in the Snapshots graph.

Why is this number smaller than the Words and Turns number? Some children who meet your recording criteria may not meet LENA criteria for inclusion in the Snapshot graph. For example, if a child hasn't yet completed a second Snapshot, or if she turned 3 before completing her final Snapshot, she would not be included in this portion of the report.

The purple bar shows the average* from the very first Snapshot for all of the included children.

The green bar shows the average* from the same children's most recent Snapshot.

Note that it may take several months before environmental changes in language experience are reflected in the child’s language skills. Although we have seen significant pre-post elevations immediately after LENA intervention, for some children the effects may not be observable for six months or longer.

Lower talk families

The LENA Home Performance Report shows data for the subset of families who meet your filter criteria and had lower levels of talk at the beginning of their participation. These families had Conversational Turns below the 50th percentile on their first LENA Day.

The N shows the number of children whose families are in the Lower Talk group. (Everyone in the Lower Talk Families group is also in the All Families group.)

The Words, Turns, and Snapshots data are calculated and displayed in the same way as for the full group.

Why measure these families separately? LENA Home was designed especially for families who have fewer conversational turns because increasing early talk has so many benefits for infants and toddlers. These families often show the greatest growth in words and turns.

Advanced research note: It is not clear that the 50th percentile is the optimal cut point for differentiating high and low talkers. It is entirely possible that parents close to the 50th percentile may be less motivated than those who discover they are below the 25th or perhaps 10th percentile at the first reported recording. More research is needed to determine how numbers can be used efficiently to identify families most likely to respond to the program.

For each measure and each time point, we average the Standard Scores from all children who meet the filter criteria, and then display the corresponding percentile.

Why does this report use Standard Scores when the other reports show counts and percentiles? While Standard Scores don't appear directly on any LENA report, they are the bridge between raw counts and percentiles. Neither raw counts nor percentiles are appropriate for averaging. Raw counts are age-dependent, and percentile ranks fall on an uneven scale - that is, a one percentile point difference at either the high or low end of the scale represents a much bigger "advance" than a one percentile point difference closer to the middle of the scale. Standard Score values have been age-referenced to LENA’s normative database, they are generated on a uniform scale suitable for averaging, and each Standard Score corresponds predictably to a percentile ranking.

The first Snapshot has to occur within 21 days of the first valid recording (before or after).

The final Snapshot is the one that was completed within 21 days of the last valid recording, provided this administration date is at least 28 days after the first Snapshot.

• If two Snapshots meet these criteria, then the one whose completion date is closest to the last recording date is used.
• If the second-to-last snapshot is at least 21 days after the first valid recording date and was completed 28 days before the identified final Snapshot, its Standard Score is averaged with that of the final Snapshot for a more robust measure of change. This is rare.

Start Date and End Date

Use these fields to specify the date range within which each child made his/her first LENA Day (valid and not hidden).

• The report will include LENA Days that were collected after the End Date - as long as the child's first valid recording occurred within the range.
• For example, input a range from January 1 to January 30 to capture all children who began during that date range, whether they continued through March, May, or beyond.

Minimum # of Recordings Required

Specify the minimum number of valid recordings a child must have to be included in the report.

• LENA requires a minimum of 4 valid recordings, but you can set a higher number in order to limit the data to families who met your own minimum requirements - for instance, only those who completed an entire cycle.

Maximum # of Recordings to Analyze

This variable controls how many of each child's recordings are used in the analysis.

• It does not exclude children who have more recordings...it just excludes the later recordings from the analysis.
• If a child has more LENA Days, then only the recordings up to that value are evaluated. Later recordings are ignored. For example, if the parameter is set to 10 and a child has 15 valid recordings, the data contributed to the "post" measure will come from recordings 9 and 10, ignoring 11-15.  
• If a child has fewer valid recordings than the max, then then analysis uses his or her last two. For example, if the parameter is set to 10 and the child has only 8 valid recordings, then this child's recordings 7 and 8 contribute to the "post" measure. 

Maximum Average Recording Interval (Days)

Here you are setting the maximum average number of days between recordings for a child, not a maximum one-time interval.  

• If your program follows a set recording schedule with a set number of recordings, you can use Max Recordings and Max Interval together to quickly see how many families are hitting that schedule, and how their data looks.

Enrollment Status

Use this filter to limit the data to Enrolled, Completed, or Dropped children. By default it is set to pull data for All enrollment statuses.