Should parents buy cell phones for their children?

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

Performance on vocabulary words:
No of characters: 533.0 578.828451883 92% => OK
No of words: 142.0 151.265690377 94% => 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: 3.75352112676 3.82278263415 98% => OK
Fourth root words length: 3.45201032557 3.50058242952 99% => OK
Word Length SD: 1.63236033942 1.80425224433 90% => OK
Unique words: 98.0 92.4686192469 106% => OK
Unique words percentage: 0.69014084507 0.61298525976 113% => OK
Syllable count: 163.8 182.283891213 90% => OK
Avg_syllables_per_word: 1.2 1.20543933054 100% => OK

Performance on coherence:
Topic speech coherence ratio: 0.0945398417905 0.0839705835288 113% => OK

Acoustic performance on paragraphs:
How many acoustic paragraphs: 10.0 4.47071129707 224% => Need less acoustic paragraphs.
Average paragraph length: 14.2 65.8948926009 22% => The average paragraph length is low.
STD paragraph length: 14.2112631388 19.7758100068 72% => OK
Average paragraph duration: 6.011 25.5208953607 24% => The speaking content is not well organized.
STD paragraph duration: 5.26128967079 7.49434385956 70% => OK

Acoustic performance on sentences:
How many acoustic sentences: 52.0 42.9832635983 121% => OK
Average acoustic sentence length: 2.73076923077 3.78147595546 72% => OK
STD acoustic sentence length: 2.28805749504 2.94285465224 78% => OK
Average acoustic sentences duration: 1.02519230769 1.39386743896 74% => OK
STD acoustic sentences duration: 0.677837314225 0.967747756167 70% => OK

Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 51.0 40.4456066946 126% => It means the content is not pronounced smoothly or it is pronounced slowly. It is word by word.
Total acoustic silence duration: 11.0 7.59280334728 145% => It may have a lot of silences or every silence is too long.
Average acoustic silence duration: 0.21568627451 0.19053887516 113% => OK
STD acoustic silence duration: 0.185823602861 0.157467062838 118% => OK

Acoustic performance on acoustic words:
Total word duration: 43.04 46.3453556485 93% => OK
Average word duration: 0.303098591549 0.308780311121 98% => OK
STD word duration: 0.160405222328 0.201157623399 80% => OK

Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 8.0 8.09623430962 99% => OK
Total_disfluencies_duration: 5.51 6.56692468619 84% => OK
Total acoustic noise duration: 3.98 3.53066945607 113% => OK

Acoustic rates:
Total speech duration: 60.11 59.5455230126 101% => OK
Compare to expected duration: 1.00183333333 0.992425383543 101% => OK
Rate of silence: 0.848444518383 0.681803438845 124% => Less acoustic silences wanted.
Rate of speech: 2.36233571785 2.53813033465 93% => OK
Rate of speech by unique words: 1.63034436866 1.55221717717 105% => OK
Rate of word duration by unique words: 2.27695167286 1.99939622689 114% => OK
Average articulation rates: 0.281457352113 0.309613076454 91% => OK

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Rates: 73.3333333333 out of 100
Scores by speech e-grader: 22.0 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.