Should parents buy cell phones for their children?

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on vocabulary words:
No of characters: 441.0 444.711560045 99% => OK
No of words: 112.0 116.580246914 96% => More words wanted. You may: choose simpler words or speak faster or remove hesitations or remove long pauses, and fully use the time, do NOT save one or two seconds.
Chars per words: 3.9375 3.81502700369 103% => OK
Fourth root words length: 3.2531531234 3.28032121604 99% => OK
Word Length SD: 1.92855076047 1.8723322822 103% => OK
Unique words: 78.0 76.076318743 103% => OK
Unique words percentage: 0.696428571429 0.655143326166 106% => OK
Syllable count: 139.5 141.574747475 99% => OK
Avg_syllables_per_word: 1.2 1.21358024691 99% => OK

Performance on coherence:
Topic speech coherence ratio: 0.0 0.0738818816272 0% => It may have issues on recording quality or the content is not so closely related to content.

Acoustic performance on paragraphs:
How many acoustic paragraphs: 5.0 3.20202020202 156% => OK
Average paragraph length: 22.4 60.3232687746 37% => The average paragraph length is low.
STD paragraph length: 19.6631635298 17.3634065801 113% => OK
Average paragraph duration: 9.012 22.9064221017 39% => The speaking content is not well organized.
STD paragraph duration: 8.4431591244 6.49597621602 130% => OK

Acoustic performance on sentences:
How many acoustic sentences: 30.0 31.1548821549 96% => OK
Average acoustic sentence length: 3.73333333333 4.0588447711 92% => OK
STD acoustic sentence length: 3.21385887819 3.18357895611 101% => OK
Average acoustic sentences duration: 1.38333333333 1.46810986539 94% => OK
STD acoustic sentences duration: 0.996655518332 1.01537252472 98% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 26.0 28.6644219978 91% => OK
Total acoustic silence duration: 6.98 5.28593714927 132% => It may have a lot of silences or every silence is too long.
Average acoustic silence duration: 0.268461538462 0.187982170178 143% => Maybe the pauses are too long.
STD acoustic silence duration: 0.205776060275 0.154715141812 133% => OK

Acoustic performance on acoustic words:
Total word duration: 33.29 35.408047138 94% => OK
Average word duration: 0.297232142857 0.306236595465 97% => OK
STD word duration: 0.173298925381 0.198589292138 87% => OK

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 5.0 6.3164983165 79% => OK
Total_disfluencies_duration: 3.63 5.14435465769 71% => OK
Total acoustic noise duration: 3.31 2.80480359147 118% => OK

Acoustic rates:
Total speech duration: 45.06 45.0716498316 100% => OK
Compare to expected duration: 1.00133333333 1.00159221848 100% => OK
Rate of silence: 0.5770084332 0.637764685501 90% => OK
Rate of speech: 2.48557478917 2.58495923209 96% => OK
Rate of speech by unique words: 1.7310252996 1.68816559523 103% => OK
Rate of word duration by unique words: 2.34304595975 2.15290372801 109% => OK
Average articulation rates: 0.291178964286 0.343871460585 85% => OK

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Rates: 75.0 out of 100
Scores by speech e-grader: 22.5 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.